Batten down the hatches: I mean the ending is perfect to write the beginning of a crossover with
Spoiler Alert, this is your last warning
Isaac is alive, and has been violently thrown around in space, when he caused the moon to crash into the adjacent planet. He is also looking for Ellie, as his voice calls her after the credits.
Ellie is in a gunship, trying to contact Isaac and Carver. She appears to be in relatively good shape, and on the bright side she is still sane
And Carver is probably alive because if Isaac can survive that shit, so can Carver.
The circumstances are perfect for starting a story

709847 Already a step ahead of you. Look up So An Engineer and a Librarian Walk Into A Laboratory…

719174 cannot find in search bar, link plox

Nvm

I'm going to write one! This will be in collaboration with Writings of Ancient. I'm surprised no one has thought of it yet.