Rumor: Possible Sonic Unleashed Screens
As for the shots themselves, they're really clean and have a Blue Dragon quality about them. With locations ranging from Africa to Eggman's lair, and no signs of Sonic's "city" (cursing by rhyme...) friends, could we be seeing signs of a good Sonic game on the horizon? Possibly, if the lack of subtitles is pointing to a more "Subspace Emissary" take on the Sonic cutscenes, with a total lack of dialog, just using animation to tell the story (also similar to the Lego games). The only downside right now appears to be the gameplay screens, which hint at a Sonic and the Secret Rings style of gameplay. At the moment there is still no word as to the platform this will land on, but if it's following the footsteps of Secret Rings, we may have to end up handing this one off.
[Update: Images pulled on request from Sega of America's Sr. Legal Counsel.]