logically, depending on what the developers want, I'm guessing three or four parts:
-A social aspect (presumably like Bully; I've never played it). if you play as Ender, this would include getting your army to accept you.
-the psycho-analysis game from the computers- with the giant and the two glasses. I have NO IDEA how it would be controlled, or how it could possibly be smart enough to not feel contrived, but wow... seriously, it would be amazing.
-the lazer game. duh.
-the ship combat game from when Ender was on Eros. Honestly, in this part, the less graphics the better.
judging by how different these parts are, I seriously doubt they would be one game. It'd be nice though.