I was thinking of a roller coaster themed to Sonic the Hedgehog for all Six Flags parks.
It is going to be a high-speed roller coaster where you feel Sonic's speed. It utilize the same ride system that was used in Blue Fire at Europa Park.
Once you board on a train, you enter to the tunnel. In the tunnel, you see 360-degree screen projector, similar to Manta at SeaWorld San Diego. Once Sonic appear, the tunnel door will open. When Sonic says "Sonic Speed!", the train will launch outside and you will feel Sonic's speed with loops and Twisted horseshoe roll.
In the entrance, there will be a Sonic statue.
The first Six Flags park to open the Sonic the Hedgehog Coaster, it will be at Six Flags Magic Mountain.