Yesterday, General Mills announced that they will be releasing a limited run of Sonic-themed cereal and Sonic-themed fruit snacks in the near future, as reported by Game Informer. There is no stated date when these will be available; however, the box features Sonic 2 movie branding, and thus will likely be on shelves at some point during its theatrical run.
The Sonic cereal features "Sweetened honey flavored" rings, and spiky marshmallows shaped like Sonic's head and green Chaos Emeralds. Game Informer also notes that it has a "Fun back of-the-box activity...."
These definitely look a step up from from Sonic's last cereal appearance, Funko's Gamestop-exclusive Sonic Cereal, which looks like it contains more blue dye than actual food. Like most special edition cereals, don't expect General Mills' Sonic box to remain a permanent product. If you want to eat a bowl of Sonic's face, you'll have to do so before it's gone.