BioShock Infinite

I like how the concept of this story/timelines/universes/whatever it's called can be used to created A LOT of games with different stories, all related to what we saw at the ending of the game.

I think this will be the last Bioshock game though. Anything else will be disappointing in terms of story. The game literally is Bioshock Infinite; it explains every potential Bioshock game. It will always be a man, a city, and a lighthouse. Nothing more, nothing less.