Fan CastingSonic the Hedgehog 4

The film follows Team Sonic as they discover dark secrets about Robotnik's legacy and his association with a metallic, enhanced version of Sonic named Metal Sonic and his plans to open a portal to Green Hills and rule over it forever. After the events of the previous film, Sonic and friends return back home to relax after defeating Dr. Robotnik for the third time with the help of Shadow the Hedgehog. They remain at home and talk to each other as various incidental things happen. Sonic goes out to fight crime in the city when he stumbles upon the same black site that contained Shadow in the previous movie. He hears strange whirring and mechanical noises coming from under the metal door and decides to peek inside. He peeks around innocently and sees nothing. He prepares to go home when he suddenly hears a sudden "clang" sound, as if metal was dropped onto the ground. He races into the other room and pulls a sheet off of a massive tube, revealing a metal version of Sonic the Hedgehog, labeled "Project Metal Sonic." Sonic pokes at the metal clone although it appears to be off. He quickly races out of there when he hears scurrying noises and returns home. Metal Sonic's eyes light up and turn on as Dr. Eggman enters from the other room with a tool box.