Intelligent Systems might have something cooking for the Wii. They are working on Paper Mario 3DS, but they won't need their entire 100-man team for that.
Monolith Soft is probably going to have Baten Kaitos 3 or something similar for 2012. They have been capable of releasing a console game every 18 months.
After Mario vs. Donkey Kong: Mini-Land Mayhem, Nintendo NST is probably working on their first 3DS game.
Nintendo SDD is most likely working on 2-3 simple 3DS games; very "casual" stuff.
Paon hasn't released anything since Klonoa, so 2011 seems like a good amount of time to make something big.
After AcroKnights, Noise is probably going to make a Custom Robo 3DS.
Monster Games should have a racing game in store for either the Wii or 3DS this year. It might be a Motocross 3DS game or something; Excitebots failed on the Wii. They usually have a consistent 2 year cycle between games.
EAD should have something huge for this holiday.