Well, I'm cautiously optimistic about this. Far as I'm concerned, last truly great Sonic game was Sonic 3 & Knuckles. Sonic Adventure & Sonic Adventure 2 were okay 3D platformers (for their time at least, the first being a bit better than the second IMO), but almost everything past that has been memorize the death drops go where the game wants you to go, and maybe for some reason push button combos to do tricks of some sort along the way. Even Sonic Generations, which a lot of people rated highly (for reasons I don't understand) was no better. They just haven't been any fun lately. Sonic has not aged as well as Mario, and as a long time Sonic fan I really hope they can go back to their roots and make more of what made the Genesis era Sonic so good. Judging by the small bit I can see in this video, it looks like they might be doing that.
And if you think this is just nostalgia talking, there are indeed modern games that are exactly what I'm talking about. If Genesis era Sonic type games are your thing, the best one right now is Freedom Planet. It is an excellent gem of a game, with developers who continue to add on for free what other developers would sell as DLC. It is what the past decade and a half of Sonic should have been, and if you're a fan of 2D platformers, I can't recommend Freedom Planet enough.