Sonic Forces: An All-Out War.
12 parts Complete In a slightly altered timeline, where everyone gives their all, instead of just sitting around (Sonic Generations), Eggman hires Starline, a master of psychological manipulation, to help against the Resistance.
This book also details the aftermath of the war, where Starline works with a mysterious force of chaos to bring down the Mobians, in an attempt to prove his superiority.
(Also, it contains reincarnations of some RWBY characters, the rights of which go to Rooster Teeth Productions)