Are you conveniently forgetting, Killzone, Knack, DriveClub, GT6, Beyond, Last of Us, Puppeteer, Rain etc...at least we know what the majority of Sony devs are doing.
North American devs:
343 Industries: Halo (2014)
Turn 10: Forza Motorsport 5 (2013)
Twisted Pixel Games: Lococycle (2013)
Team Dakota: Project Spark (2014)
Black Tusk Studios: New IP (TBA 2015?)
BigPark: TBA
Goodscience: TBA
MS Victoria: TBA
Platform Next Studios: TBA
KALE: TBA
European devs:
Lionhead: Fable Anniversary (2013)
Lionhead 2: N/A, but it's assumed that they're working on a AAA action-RPG.
PressPlay: Max: Curse of Brotherhood (2013)
Rare: Kinect Sports Rivals (2013)
Rare 2: Do they even have a second team at this point?
London Lift: TBA
Other:
MS Osaka: TBA
We have a good idea of what Microsoft's studios are working on. Remember that a lot of the studios with unannounced projects are still in the process of recruiting devs for their teams.
Good Science and BigPark are the only big questionmarks at this point. I suspect that Good Science have been absorbed into a different team at Redmond and that BigPark has gone app/UI only, but we'll have to wait and see. It would be kind of stupid to not make a sequel to Kinect Adventures, though.