In another G4/Tech TV piece Todd Hollenshead talked about what's next for id, which is an all-new property. He also mentioned Return to Castle Wolfenstein 2 is in development, though didn't say what company is developing it. EuroGamer is speculating the developer might be Splash Damage, contributor to DOOM3's multiplayer maps (and they did Wolfenstein: Enemy Terroritory). In a job posting from a while ago the UK based studio mentions "In a continuation of our successful collaboration with id Software and Activision we have started production of a new full game based on the cutting-edge Doom 3 engine".