Just as they Fleets of Alliance are slowly Moved towards the Other Galaxy with their Fully Might There is still Some Sectors that are have to stay for the Defense in Case their Enemy attack them  unexpectedly

While others are still Gathering Their Forces for enough Might to Join the War against the Forces of Chaos and Tyranids

40k Galaxy

Gothic Sector

It has been Thousand of years in the Gothic Sector that they Battled against the Forces of Chaos During the Gothic War

And the Tyrainds During their Full Might That was called the Tyranic Swarm War Since they attack at their Full Strength and Might as well Their True Endless Number That have Made It's Way to their Galaxy

Port Maw

A Admiral Approach the Man in the Office he is standing looking at the Void with Thousands of ships that are all Preparing to Depart

"Lord High Admiral, They have Pinpoint the Exact Location to the Other Galaxy" Said Admiral

With it the Man Turn Around

Lord High Admiral Spire One of the Greatest Naval Admiral in the Imperium

After the Gothic War and Hunting the Demon who have Brought Ruin in his Sector he is Sent to the Future to 41st M

He quickly Assumed Command in Cadia where is Almost Fell to the Chaos and Wait for the Reinforcement From the Space Marine Legion

With it they Send 6 Legions, The Ultramarines, Salamanders, Thousand Sons, Raven  Guard, Alpha Legion and Space Wolves

He is as well a Dear Friend of Commander Ronan Belleza for they have fought Together During the Gothic War

He was only a Young Captain when they first Meet, Ronan Saved his ship from Certain Destruction from a Chaos ship

and After a Long War He is able to Marry an Eldar and have a Family of his own and one of his sons Named after Ronan as an Honor to his Space Marine Friend and his Son Proudly like it as well his wife even though there's a possibility that his wife may Outlived him

"Ronan, Prepare the Fleet to Depart time to join the War" said Spire

"Yes, Father!"said Ronan as he Bow and Moved and Annouced the Fleet to Join the War against the Forces of Chaos and Tyranids

"Time to Meet with you again my old Friend" said Spire as he begun to walk toward to his ship

Time Skip

He is on Divine Right a Relic During the Gothic War, Flagship of Lord Admiral Ravensburg and Now Flagship of Lord High Admiral Spire

These Emperor Class Ship has seen Many wars, Captained by the Finest Admiral of the Imperium and have even Dueled some of the Mightiest Chaos, Xenos Ship and Monstrosities and win the Battle

it is also been upgraded to have Auto-loading system, so they will have a Less Crew, But more pilot and Aircrafts can be add as well as Imperial Guards for Transportation

He seat to his Throne

"Are the ship Fully Operational?" He ask the Tech-Priest

"It is 100 Percent Operational Lord High Admiral all systems are fully Efficiency and the Machine Spirit is now Roused for War" Said the Tech Priest

"And the Fleet?"

"They are all Ready for Combat Lord High Admiral" said the Fleet Commisar "They are all Awaiting your Command"

"Navigator?" he said

"We have Pinpoint their Location and we are now Ready for Warp Jump" Said the Chief Navigator

"Good time for Warp Jump!' said Spire

With it Every Ship are slowly Enter to the Warp

"We are the Defenders of Humanity, We are the Emperor's and Empress Blazing Sword and Imperium's Crushing Fist Hundreds of Billions at Hand Ready to die in the Mission of the Cold Unforgiving Space

WE ARE THE IMPERIAL NAVY!!" Spire's Speech 

With it Every Last one of them Enter to the Warp

_______________________________________________________________________________________________________________ 

40ks gods Realm

The Emperor is Seating on his Throne

"What is your decision Now Emperor of Mankind?" said the Void Dragon

"Are your Armies Ready for War?" Said the Emperor

"Yes" said Khaine "They are all Ready and you?" he ask the Emperor

"The Legion of the Dammed is about to Be Unleash" Said the Emperor

"The Blackstone Fortresses shall be Unleash as well" Said Isha

"Every Machine Spirit is Rouse for the War" said the Machine god "All of them are Ready to deploy for War"

"The Dead will have their Vengeance and it will wait no Longer" said Ynnead

"We will join as well" said One of the Old Ones "We will Unleash our Powers once again"

"Then we are all in Agreement for War since My Wife is already Leading the Crusade and it's Time to Join as well" Said the Emperor as he Begun to Stand

He looked at the Legion at the Dammed that are Waiting as they Stand Waiting for his Command

The Legion of the Dammed Consist of 

Thunder Warriors, Space Marines, Primaris Space Marine and the Custodes Themselves

As well as Living Saints

And the Numberless Imperial Guards

The Emperor Smiled

__________________________________________________________________________________________________________

Halo Galaxy

Earth

It has been Years for them since they have Travel Together with the Other Galaxies with the Alliance

In the Defense Station an Old Man is Seating on his Office

"Admiral Lord Hood!!!" said one of the Crew in the Station as he Run towards the Aging Admiral

He Goes towards the Bridge where there is several People are There as well as other Alien Race

"What is it?" He ask

"A Beacon sir!"

https://youtu.be/0jXTBAGv9ZQ

"Hm it appears they Need our Help" Said Hood

"Admiral Lasky Prepare a Fleet and We will answer the Call" Said Hood

"Understood Admiral" said Thomas Lasky

"Arbiter your Coming?" said the Legendary Master Chief John 117

"Were it so Easy" said The Arbiter "Yes, We will go as well'

They Board their ships

a Thousands of ships are now orbiting the Earth Both with UNSC and Sword of shanghelious ship

There is A Hundred Infinity Class Ships

"Are they all Ready?" Lasky ask

"They are Admiral" Said Roland

"What are we waiting For Human? "said R'tas "Let's Saved Their Asses right?" 

"This is UNSC Spirit of Fire we are Ready to Deploy" said Captain James T Cutter

"Come Boys  Let's go and Saved the Ultrasmurfs as well as Lord Grandpa Smurf!" Said Cortana as she Giggle "And I can't Wait to Meet them Again as well as Athena"

The Master Chief smiled at that "Right Let's Saved them"

"This is Shadow of Intent we are all Ready we are now Waiting for you Admiral Lasky" said Arbiter

"No Need for that" said Hood who Decided to Join as he is another Infinity Class "All Ships Deploy!"

Millions of Personnel from UNSC and Millions of Warriors from the Sword of Shangheli will join the War against the Forces of Chaos and Tyranids

With it They Begun to Enter through Slipspace and Go to their Destination 

_____________________________________________________________________________________________________________

Starcraft Galaxy

Terran Dominion 

It's been Years here as well When they are saved by the Ultramarine Legion and their allies

And Now They have a Celebration of their Alliance with them as 3 Faction have Gathered here

Korhal

 "Emperor Valerian The Beacon from the Other Galaxy has been Activated" Said Matt Horner 

"It appears They are Asking for Aid" said Karrigan

"Then we will answer the Call" said Artanis

https://youtu.be/WPYv1Gd8hwI

"Prepare the Troops and Fleet, Time to Help them" said Valerian

"It's Our Turn to Saved Them" said Raynor As he Smile

Outside of the Planet

Tens of Thousands of Ships are Now Being Assembled Including  The Terrans, Protoss and Zerg

It's been some Years that they Assembled this kind of Massive Fleet and now Ready For War

"Are all Fleets are Ready Now?" Valerian ask

"My Warriors Are Ready for Battle" Said Artanis

"The Swarm is Ready to be Unleash" said Karrigan

"Then Let's Go and we can't be late to the Party and Let's say Hi to Them" Said Commander Jim raynor

Millions of Terrans and Protoss Are Ready to help and Numberless Zergs is about to be Unleash

With it Every Ship Goes to the Other galaxy Fully Geared for War

________________________________________________________________________________________________________

Star Wars Galaxy

They Still Remembered When the Alliance Saved them from the Corruption of Palpatine as they are able to Overthrow Him

Curasant

Senate Building

Jedi and Senators are Discussing Some Topics Until a Clone Trooper run there with an Urgent Message

"Chancellor Amidala!" Said a Trooper

"What is is Trooper" said Anakin Skywalker

"The Beacon has been activated by the Ultramarine legion" said the Trooper

Then the Senators and jedis Murmur Themselves

"Then we shall answer the Call, We will Join the Fight" said padme

"The Jedi are with you Supreme Chancellor" said Mace Windu

"It's time to Repay our Dept with the Ultramarines, we shall" said Grandmaster Yoda 

"Then Prepare the Fleet we will go and Fight Alongside with them" said Anakin

In the outside the Clone Troopers are now Entering their Transport

https://youtu.be/dylqDO4uEXc

https://youtu.be/if9SBw-dC78

Anakin Skywalker Board his Ship

The Executor Class ships as well as other Jedi Master have one of these as well as their Flagship

"General It is Time" said Rex

"So, Master are we going Now?" Said Ashoka

"Yes, Snips Time to Saved them" Said Anakin

They're are Tens of Thousands of Venator, Acclaimator, Imperial Class as well as Resurgent Class Star Destroyers

And Millions of Clone Troopers

The Fleet Entered through Hyperspace to Saved their Friend from the Ultramarine

__________________________________________________________________________________________________________

Star Trek Galaxy

Star Fleet Base

It been Some Years Since they have Travel with the Other Galaxy and Explore as well as Adventure with other People

They have Made Friends and Learn their History and Culture

While Jean Luc is in his Office he is now Fleet Admiral

Q Suddenly Appear

"Hello there Picard" said Q in his usual Manner

"What do you Want Q" Said Picard Annoyed at the powerful being

"Well The Beacon has been Activated" Said Q

Picard Stand "What? Are you Sure?" 

"Yes, In Fact in Belongs to the Ultramarine legion" Said Q

"Then i will Make Haste and Saved them" said Picard as he Begun to make Commands

"Too any Available Fleet Our Allies the Ultramarine Legion has asking Our Aid and It's time to Saved them" said Picard

https://youtu.be/EO1FZEUbZJE

With it Every Ship Captain Goes to their Starship of Different Shape and Sizes

There's  Thousands of Them here including some of their Allies the kligons

His New Flagship

The Invincible Class are the Largest, Most Powerful and Most Advance Their ship has ever built Due to their Huge Cost they have Only 20 of them This ship is not Just an Exploration Vessel it is also, a Carrier a Battleship and a Command Ship

And it is Proven Itself to be Effective and it is Even able to fight off a Borg Cube with it's own

Size

Length:

1,607.2 meters

Beam:

764.4 meters

Draft:

305.76 meters

Complement:

Total:
4,000 (800 officers, 3,200 enlisted)
Ship crew:
3,200 (640 officers, 2,560 enlisted)
Fighter crew:
800 (160 officers, 640 enlisted)

The Name of his Flagship is Enterprise F (Well the E is Destroyed)

"Are all Systems Ready?" Picard ask as he Seat in his Chair

"Yes, They are fully Operational Fleet Admiral" said Data

"All Crews have Now Reporting In Fleet Admiral" Said his First Officer William T Riker

"All Weapon System are Online, They are now Hot and Ready to Fire" said Worf

"All Medical Supplies, as well infirmary are Ready in Case there's Wounded in there"said Dr, Beverly Crusher

"The Warp Engine is Stable and we are Ready for FTL Fleet Admiral" said Georgi La Forge

"All Fleets are Ready Fleet Admiral" Said Counselor Troi

"This will be Exciting" said Q

They Stared him

"What?" said Q "I Want to Watch the Battle as well maybe some Help" Said Q Non chantly

"Whatever... It's time to say Hello to our Friends" said picard "Pinpoint the Beacon

And Engage"

With it Every Ship Enter their Own FTL

___________________________________________________________________________________________________________________

Mass Effect Galaxy (Spoilers)

Citadel

James Shepred still Remember when he Travel with the Other Galaxy and Made Friends with them

He still Remember when He and His Crew from the Normandy Joined for Some Adventure as well as Battles and knowing their History and Culture

"Commander The Beacon has been Activated by the Ultramarines Themselves" said Miranda

James Shepered stared at her for a Moment Then He Nod

"Alright Let's go" said James as he Walk

Then admiral Hackett appeared "Where are you going Commander?" He ask

"The Beacon has been Activated" said Shepred as he Continue to walk

"Then the System alliance will answer" Said Hackett "I'll gather the Fleet as well as the Citadel Fleet" with he Moved to the Counsel

Time skip

https://youtu.be/yVm_ljDSdwA

Shepered board his Ship the Normandy

"Where To Commander?' Said joker

"Pinpoint this Location Our Friends the Ultramarines have ask for Aid and we will answer for it" Said Shepered

joker Nod as he prepared to Lunch to their Own FTl

"You will not Go alone There Commander" said the Turian Primarch

"We are now Good to go Commander" said Garrus "And Ready for Some Action"

"All Systems are now Fully Operational" Said EDI

"All Fleets are now Ready to Moved" Said Admiral Hackett

"Then Let's Go" Said Shepherd 

All ships Entered to their own FTL and Rescue the Besiege Ultramarines

______________________________________________________________________________________________________

Narration: Now Their Allies has Answer the Call

The Alliance will be Reunited

The Full Might of the Imperium, The Eldar, Tau, The Necrons, The Terrans, The Protoss, The Zerg, The Federation, The Galactic Republic, and Jedi, and the Citadel Fleet

Will be Unleash to the Forces of Chaos and Tyranids

The Greatest Battle in History shall be Written and will be Legends Through Eternity of Time

And So

The Fate of Falmart Hangs in the Balance

__________________________________________________________________________________________________________

And Done

Admiral Spire has a Cameo

The gods of 40k will Join as well

The Universal Alliance Will Battle against the Forces of Chaos and Tyranids

Next Chapter will be the Big Battle that have been Waiting for

I'm also Planning to Change Picard's ship as you have look above

There will be some Character Cameo in the Next Chapter

See you Next Time Folks