Godzilla was looking out at the ocean with Mothra meditating on his back when he felt her wince.

Godzilla: My Queen?

Mothra: I feel a prescence...new, no...familiar. Coming here

Godzilla: I feel it to..it can't be.

Gamera came out of his shell form and landed on the shores, he then headed up further on the island on foot, the King and Queen then saw their long lost comrade approach.

Godzilla: Gamera?

Gamera: Godzilla. How are you? Are those new spines?

Godzilla: Yes..well, it's a long story. It's great to see you again.

Gamera: And Mothra, you're back.

Mothra: Indeed, Gamera. Do you have any questions?

Gamera: Well, a few...*chuckles* Scratch that, a lot but i don't want to bore you two to death. I'll get the glaring one outta the way...how long has it been?

Godzilla: Well...over 2 million years

Gamera: 2 MIllion?? W-wow...I really overslept there. Wait--Ghidorah!

Mothra: Ghidorah's gone, for good.

Gamera: Oh..thank goodness. *looks around* Seems like i woke up to a better world after all. 

Gamera then heard metallic stomping, as did the King and Queen arriving on the shore was none other than Mechagodzilla

Mechagodzilla: Greetings Gamera.

Gamera: Umm, Godzilla. You mind telling me who is this?

Godzilla: Mechagodzilla. Our new ally.

Mechagodzilla: Monarch dispatched me to see you. It is nice to meet you by the way.

Watch Asher Grisantis YouTube films Return Of Mechagodzilla and Mechagodzilla: The Mechanized Protector. Both stories of which take place between A Prince's Journey and Gamera's Return.

Godzilla: I assume you're also here to learn Gamera's story?

Mechagodzilla: If he does not mind that is.

Gamera: Don't mind at all my...metal-skinned friend.

Mechagodzilla: Before we begin Monarch gave me this question to ask, how could you breathe in space?

Gamera: I'll explain in the story, feel free to ask me anything as I tell the story.

Mothra: Go ahead, Gamera.

Gamera: Okay, first I crash landed on this planet almost 4 million years ago, the last survivor of my race--

Mechagodzilla: You are an alien???

Gamera:...Yes. *to the King* Is he always like this?

Godzilla: Mechagodzilla, aren't you connected to Monarch's database? Wouldn't you already know what Gamera is.

Mechagodzilla: Normally yes, but actually Monarch has barely any information on Gamera, he is completely new to us.

Gamera: In that case, settle down. As it's quite the long story.

We transition to a forest in the Titan Age.