Ready at Dawn - would be perfect for a Jak and Daxter 4 or God of War 4. They have experience with the 2 franchises and it frees up Naughty Dog/Sony Santa Monica to work on other games.
Naughty Dog (after Uncharted 4) - a new IP. The Last of Us is better as a self contained story. ND has started off each generation with a new IP so I was surprised they are working on U4 anyway (probably requested by Sony).
Guerilla Games - enough Killzone. The franchise should never make another comeback. I hope that the rumors are true and they are working on a WRPG called Horizon.
Rare - Banjo Threeie lol or an Urchin like game
Nintendo - a full fledged sequel to Super Mario 64. None of this 3D world stuff anymore. A full fledged, HD Mario 3D platformer
Retro Studios - a full fledged WRPG like Raven Blade or a first person shooter. They could be Nintendo's new Rare
Bioware - KOTOR 3!!!