I feel like the shot of Eggman that they showed at the end of the trailer will be the last shot of the movie, in a poorly-advised attempt at a sequel hook, and he'll spend basically all of the movie as a poor man's Snidely Whiplash or the villain of Wacky Races whose first name is censored (the Dastardly one).
Also, the CGI is really obvious, Sonic's design (especially his hands and legs) creeps me out, and it seems like one of those adaptations that will focus on the humans way more than the title character, but I saw all of that coming.