It appears that Sonic isn't done with the Xbox Live Arcade just yet as it appears that Major Nelson has accidently outed the blue hedgehog as a soon to be available Arcade title in the form of Sonic CD.
Major Nelson broke the news whilst he was telling people what they can expect at PAX which is upcoming very soon and this is what he had to say:
Xbox 360 Booth #432
Mass Effect 3 has landed in the Xbox 360 booth! Come on by to check it out, along with a slew of Xbox LIVE Arcade titles: Trials Evolution, Skulls of the Shogun, Crimson Alliance, Splatters, Orcs Must Die, Ms. Splosion Man, Retro City Rampage, Sonic CD, War of the Worlds and Trine 2.
Sonic CD was the expansion and updated version of Sonic 2 on the megadrive back all those years ago, unfortunately even though the game was met with critical praise. The Sega CD system wasn't so the game faltered and never really got out of the starting gates.
Will you be picking the game up now that its on the way soon?