A couple of the more interesting tidbits:
IGN wrote:Sonic is no longer the stubby, kid-like bullet of blue spiky fur. While retaining his general form -- smirky smile, giant blue head spikes, and classic white and red outfit, replete with white gloves -- SEGA has grown Sonic into an adult by means of a few simple techniques. The team has basically stretched his legs and arms to relatively human proportions. Thus, Sonic still looks just like always did, but now he's about 5'10". In fact, all of the characters we saw, Dr. Robotnik (Eggman) and <b>Sonic's new nemesis, a white hedgehog</b>, retained a relatively human-sized height. The effect is a little alarming at first. Sonic looks like a skinny dude in a Sonic suit now, at least when he's standing still. Once he starts running, it's all different. But still, you'll need to take second and third glance to get accustomed to his new look.
Due on Xbox 360 and PlayStation 3 this fall, Sonic's new game follows a simple narrative premise. In a pristine kingdom holding a royal family, a certain Princess Elise retains a chaos emerald -- and a deep secret. In an inevitable turn of events, Dr. Robotnik learns of the emerald and kidnaps the princess, and thus the emerald, and Sonic is compelled to retrieve her and the precious stone. The new rival, basically a cream-colored furry that looks remarkably like Sonic, appears in the following cutscene, looking down from an overlooking hill into a village, and proclaims, "I've finally found it, the Iblis Trigger." The Iblis Trigger we're told is Sonic, and this new rival is going to cause him great pain due to vaguely revealed supernatural powers. <b>You'll also be able to play as the new character.</b>
Check out the full article and some new screenshots at the link below.IGN wrote:Sonic's new game is split into two types of gamelay [sic]: action and town stages.
Source: http://uk.xbox360.ign.com/articles/704/704896p1.html
Let the bitching commence.