Chapter 1:Knock Knock.

The sonic heroes were broken up.

Sonic is a super hero named, "Whoa! What was that!" just kidding, he has joined the police force though.
Knuckles and Rouge are married, Charmy moved to real estate, Espio is a professional assassin, Vector is a wrestler, Amy went into fashion design with Cream, Big died, Shadow and Omega work for G.U.N., and Tails is a weapon manufacturer.
He sitting in his laboratory finishing a phone call when he heard footsteps.
"No, I can't produce 7,000 rings in five days!"
clink, clink, clink

"…h-hold on Sonic I'll call you back."
"Wait Tails, No!"
Now, these weren't ordinary footsteps, these were slow and deliberate, and were more like someone with metal boots was walking through his laboratory.