One of the (potentially lesser-known) gems of the classic franchise is coming back at the end of the year, this time coming to XBLA, PSN, and pretty much everything but Wii and 3DS.
What's known so far:
-Rather than being a straight-up port, the game has been rebuilt using the "Retro Engine" developed by programmer and fan Christian "Taxman" Whitehead and licensed for use by Sega.
-The game now has support for 16:9 widescreen.
-This will be the first release of the game in North America to have the original soundtrack from the Mega-CD version. Players may choose between the original soundtrack or the US version. Due to rights issues, however, the original vocal themes ("You Can Do Anything" and "Cosmic Eternity") are instrumental-only.
-Tails is available as a playable character after clearing the game for the first time.
-The game has apparently been retconned to take place between Episodes I and II of Sonic 4. Uh, why?
As a long-time fan of the series, and with CD probably being my favorite out of them, I'm really looking forward to this.