“Originally the game was supposed to come out in summer this year. While it wasn’t really apparent at the time, we announced this as a PSN, XBLA and WiiWare title but at the same time the iPhone version of Sonic 4 was also in development. The team wanted the game to work really well on the iPhone with the same stages and the same kind of mechanics as the console versions, but it didn’t really work the way the team imagined. What they did was they kept the iPhone version closer to the original and they went back to the console version and changed some stages to be better playable on console. That’s the reason behind the delay and the extension in the development schedule.” - Sonic Team’s Takashi Iizuka
Well, we’ve been hearing that the delay has been put to good use to fix all sorts of other problems that the game has. Let’s just hope those other issues get squashed prior to release. I’m getting pretty worried about this project.