[quote name='ZForce915']It will be a game published by Microsoft.[/QUOTE]
Small Arms, UNO, Eets: Chowdown, Hexic 2, Jetpac Refuelled, Marathon: Durandal, Spyglass Board Games, Tetris Splash, and Word Puzzle are the only XBLA games published by Microsoft that aren't free already.
I already have Hexic 2 and UNO... there's really not much else there I'm all that excited about.
I hope it's not UNO, as EVERYONE already has that game, and giving people a game they already have as "compensation" will just anger people even more.