Since just about everyone here has beaten this game, how do you think they will proceed with the story for the sequel? They said a year ago both endings were "valid" and they hadn't decided which would be canon, so it can go either way
If Eve does go back to space, then I guess theres still plenty of Naytiba to fight in other parts of the planet. If you merge with the Elder, you obviously have a lot of enemies to fight in space. You could also go around the world eliminating other dangerous/wild Naytiba and trying to rebuild civilization