I always thought of a game that would be Halo themed but in a Final Fantasy style game play.  I think that it would work out to be a pretty awesome game.  For one it would be really easy to make multiple games out of it with Halos long storyline (ex: FFI-FFXII).  Though Final Fantasy isn't a continuing storyline, that wouldn't matter.  Just the game play of it would make it a fun and complex.  You could have on in the UNSC point of view and then in the next game have it in the Covenants.  Call it something like, "Halo Revelations"  or something.

What do you guys think of a game like that?