Bungie have had a interesting history, with the development of Halo starting as an RTS game and eventually becoming a Xbox Exclusive First Person Shooter and then later with their split with Microsoft in 2007. For a while, a 'advantagee' that Xbox 360 fanboys would present would be 'We have Halo'.
Well Bungie's next project will not be exclusive to the Xbox, and they also signed a ten year deal with the worlds biggest publisher, Activision.

Some of you are probably standing up in your seats at this point, with all of the Infinity Ward blashpemy lately some gamers have launched a boycott against all Activision published games, treating Activision like the plague. But before you question Bungie's decision, think about their previous situation.

• They have announced that Reach is their final Halo game.
• They are working on a new IP without a publisher.
• They want this new IP to be distributed on multiple platforms.

So they couldn't really use Microsoft as their publishing partner for the future, if they are looking to go multiplatform. It is also a lot easier to develop a game when you have a publisher that is paying you to prouduce it from the get go. Activision probably offered a large sum of money, and with half of Infinity Ward gone, I am not surprised.

So what do you think the next Bungie game will be, will they stay with first person, or will they pick up where Infinity Ward has left off and continue with the Call of Duty games?