Just over a month after Sonic the Hedgehog 3 hit screens, Sonic 4 has set a release date, and fans are already wondering what part of the games the fourth installment will follow. Sonic 4 is due to release in theaters on March 19,

While nothing has been finalised just yet, speaking to Collider earlier this month - the Sonic 3 movie writers Josh Miller and Pat Casey mentioned how Sonic and the gang could potentially go beyond Earth in future outings, to all sorts of "fantastical zones" and worlds.

Sonic's director has taken requests to add Silver to the movies into consideration, and concept art hints he was almost in Sonic 3.

New Sonic 3 concept art has emerged and has swiftly been taken down, but not before fans received a peek at a cut Metal Sonic and Eggman moment that may reveal where the franchise is heading next in Sonic 4.