We know Dr. Eggman voiced by the wonderful Mike Pollock is in the film, but a new screenshot from it shows off some of the detail involved in this Disney/Pixar world as well as giving us a proper look at our antagonist protagonist.
Additionally we can see that as well as Zangief from Street Fighter, Chun Li will also be making an appearance. If you zoom in on the image you can also see M.Bison walking around in the crowd.
Like a BOSS.
[Thanks to Discoponies for the tip]