Sega has apparently joined the effort forged by Valve to change the rules of how long you can go between episodic releases, while still being allowed to call said releases "episodes." In a recent interview with Eurogamer, Sonic Team's Takashi Iikuza talked about Sonic 4, explaining, "This year, 2011, is the anniversary, so we're focusing on the celebration title." He later added, "But moving forward to 2012, Sonic will still be going, so I'd hope to provide Episode 2 then."

In other news, have you guys seen this new show, Best Buds Living It Up In New York? It's this great new NBC sitcom. The first episode aired last night, and the next episode is going to air in about eighteen months.
http://www.joystiq.com/2011/08/23/sonic-4-episode-2-rolling-into-place-in-2012/