According to wii.qj.net, another Sonic 4 leakage is a foot.
I think i'm downloading this when it hits the wiiAh, Sonic 4. Will your leaked videos ever stop coming? Yes of course, but not today. Here's a video of the game's Mad Gear Zone - Act 2. You can also check Super Sonic out at the 3:14 mark.
The downloadable first episode of Sonic 4 comes out this June.