(in Earth's orbit)

we see the nemesis, along with the entire decepticon armada orbiting earth. as for why the decepticon armada is here, well BlitzKrieg suggested that soundwave should send a message to any and all decepticons scattered across the galaxy to meet at Mars' orbit, which brings us to now

now we see Megatron standing in outside the hangar withStarscream, Soundwave, Knockout, Breakdown, BlitzKrieg & Slipstream next to him and behind them are vehicon seekers, waiting for megatron's commands

Megatron: DECEPTICONS, TRANSFORM & RISE UP!!!!!

he said as the vehicons raised their fists and transformed into their jet modes and fly into earth's atmosphere while soundwave opened a groundbridge as BlitzKrieg led the vehicon troopers through the groundbridge and started the attack on earth

(5 months later)

we see that the earth's buildings are in ruins as humans are either being used for slavery in the energon mines or being held as prisoners for shockwave's experiments

now we see BlitzKrieg, along with Slipstream, Cyclonus & Knockout, who is at a spacebridge terminal in one of the mines as he put a certain program he made after he copied the grimoire's portal spell from BlitzKrieg's mind

Knockout: and that should do it.

he said as when he pulled a lever, a red portal opened up and turned to Blitzkrieg with a villainous smirk on his face

Knockout: so, wanna scratch the finish off your betrayers, BlitzKrieg?

he asked as BlitzKrieg deviously smirked and transformed into his cybertronian car mode as Slipstream, Cyclonus & Knockout also transformed and drove through the portal

(pentagram city's outskirts)

we see the red groundbridge portal open up as BlitzKrieg, Knockout, Slipstream & Cyclonus exit the portal and change into robot mode and see the city from the distance

BlitzKrieg: well, guys....welcome to my old home.

he said while glaring at the city