This is based off of Sonic the Comic Online’s continuity. Sonic has been framed so well that he can’t prove he’s innocent and nobody but Tails believes in him so he’s on the run. Robotnik had a nervous breakdown and uses a computer to talk and do everything for him. Shadow was released and worked with Robotnik, knowing he was evil but doing so anyway because he knew that Robotnik was once Kintobar and he vowed to protect him. Following that story, Shadow had died and was later replaced with a digital version of him that was given a real body. But this comic will go a different route. That’s kind of a spoiler but the explanation is necessary for those not familiar with STCO.