The rumored new title for Sonic 4 is wild

A rumor suggests that the next movie in the Sonic the Hedgehog franchise could be names after a classic video game.
TheGamer on MSN

Sonic The Hedgehog 4 Could End Up Being Called Sonic CD

An insider has claimed Paramount is considering calling its fourth Sonic movie Sonic CD instead of Sonic the Hedgehog 4.
Dexerto

Sonic 4 title rumor hints at return of 2 fan favorite characters

Paramount is hard at work on Sonic the Hedgehog 4, and a rumor about its title could mean the arrival of two classic characters.
Kotaku

Sonic CD: Episode Metal

All the Latest Game Footage and Images from Sonic CD: Episode Metal A mod that adds Metal Sonic and Amy Rose to Sonic CD as playable characters, with their own movesets and changes to the story scenes ...