"This time, a sorceress named Merlina summons Sonic to the mythical realm of King Arthur, but it seems the fabled monarch has somehow been corrupted and now rules the land as the tyrannical Black Knight."
"This time, however, some of Sonic's friends will be playable. Each hero will boast unique abilities, and though the team isn't ready to divulge the full cast just yet, we do know the identities of two playable comrades: Knuckles, who brandishes two swords at once, and Shadow."
"Uses a similar storybook device as Sonic and the Secret Rings."
Developed by the same team as Sonic and the Secret Rings
http://www.gamekyo.com/news28343_sonic-a nd-the-black-knight-first-pics.html
This is some grade A stuff, you Sega fans sure got us beat.