This was announced AGES ago but SEGA finally showed something off:
This appears to be a port of the Sega Ages Monster World collection (although it's missing Monster World II: Wonderboy 3 the Dragon's Trap), and it's being handled by M2, not backbone. The heart of this collection, however, is the release of Monster World IV - fully translated into english - for the first time ever outside of Japan.
This is my absolute favorite Sega series of all time, I can't goddamn wait. Only the XBLA was shown off today, but the PSN version was announced over a year ago, so this is assuredly coming to the PS3 (and likely Steam) as well.
Sega's string of DD hits continues. It's the worst kept secret in gaming, but Sega also hinted that Shenmue is the next game which will be announced (and it will be).