So far they're taking a lot of fan ideas and concepts and using them in the game. This is evident if you look over some of the Sega blogs and site, where Sega claims they're trying to listen more closely to the fans. It's about time!
I don't like the lanky Sonic as much, either, or the way they have him moving in the preview(mainly the jumping-it looks a little bit choppy). The background in the clip looks pretty nice, but I hope they elaborate the further backgrounds more like in the original games, with lush foliage, mountains, and cities.
I'm glad it's only Sonic, but I will miss Tails if he's not in it. It'd be nice to have a two-player game like Sonic 3 where Tails can help you out when you need to fly, backtrack or reach special areas. This could add a lot of fun and replayability to the game. As far as the others, good riddance. A Knuckles cameo would be great though, possibly even with a two player mode with Sonic/Knuckles. This is all probably asking a bit much as far as reprogramming at this point, but I can dream.
If you notice on the character countdown, Tails and Knuckles don't make an appearance. Hopefully they are in the game!
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