Well, okay, not next next. The actual next game from Scribblenauts developer 5TH Cell is Drawn to Life: The Next Chapter on DS, out October 27. In an interview with Gamasutra, 5TH Cell's creative director Jeremiah Slaczka revealed that the game after that will be the developer's first console game, a "pretty big" game for Xbox Live Arcade. "It's going to be really cool," Slaczka said. "We're very excited about it... it's totally not ready to be announced." Just think of how exciting it will be when it is ready! That's got to be ... more exciting.
The full interview is really interesting stuff, going into the inspiration and early design of Scribblenauts, some discussion of emergent gameplay, and 5TH Cell's somewhat indie-like philosophy.