Is Sonic Riders getting a sequel?

I don’t remember Sonic Riders being a blockbuster hit and playing it was sort of blah. It was far from Sega’s best, but it wasn’t the atrocity that the new Sonic the Hedgehog, Either way I never expected it to get a second game but according to EB Games it is, Sonic Riders: Zero Gravity. So far the possible sequel is only for the Playstation 2 and the Wii, the latter being $20 more. Motion control warrants extra money right?