SEGA has kindly tossed up a bunch of Sonic Generations 3DS screens for your wretched judgment. A few of these made it into Hamza's hands-on impressions article, but there are a bunch of fresh ones too. The images all revolve around Green Hill Zone, which I think we've seen enough of by now.
I'm still keeping my expectations wisely low for the console version, but I expect good things from the 3DS alternative. Sonic Colors for the DS was a fun time, so I should hope Dimps pulls out some magic once more.