http://www.xboxyde.com/news_2888_en.html (Whoops, Shadow Hog already posted it, but
you can download the trailers, too! Just look for the links at the end of the post!)
SONIC the Hedgehog trailer. I'll recite my opinions as such:
a. The presentation is astounding. Yep, I think this is SA1 quality.
b. Speaking of presentation, I think this is the best they've done at capturing the speed of Sonic.
c. I love the new Eggman. Seriously. I don't care what the rest of you think.
d. I'll be really happy if Sonic, Shadow, Eggman, and Cream (the Hedgehog) are the only ones out of the regular gang to appear. It seems like an adventure centered solely on them, rather than Tails, Knuckles, Amy, etc.
Perhaps the art direction isn't Sonic-ish, but the way the hardcore fans have been complaining about the current style of things, I think taking the Sonic series in an all-new, unprecedented (for Sonic, anyway) direction makes a lot of sense. That's why I'm just taking this game as it is.