As reported by the Linkedin profile of Jonathan Browne, the developer who holds the post of Senior Product Manger within the Microsoft Studios, the House of Redmond is working on four new IP not yet announced. Browne stressed, however, that the design phase of new intellectual property is still a premature State.

At this point it is likely new exclusive that Microsoft is preparing for the new Xbox and that could be announced in conjunction with the console or at a later time. We don't have to wait for more news on what Microsoft has in store for the next-gen.