Very late to comment on this topic, at first I wasn't sure on what to think since this game just seemed like S&ASR without non-Sonic Sega characters, it also didn't help that I'm still bitter about Sonic Forces, but I've now seen it in action and watched a couple of interviews and it actually seems pretty interesting, it's a sort of team based racer with each of the 3 team members having a unique skill to carry each other, which makes the game less about trying to get to first place and more about using teamwork to do that.
Wouldn't say I'm excited for this game yet but it does seem to have potential, the whole team dynamic is something I don't remember seeing in any other racing game and I am interested to see which Sonic characters they'll add that were not featured in any of the other S&ASR games, not to mention that this time we also have developers who have proven themselves in the past and a soundtrack created by Crush 40.