The studio responsible for Sonic Advance and Rush are working on the WiiWare title.
A listing on href="http://marketplace.xbox.com/en-US/games/offers/0bbf0002-0000-4000-8000-000058410a07">Xbox.com
reveals that Dimps is developing Sonic the Hedgehog 4, according to
Kotaku.
Dimps previously worked on the Sonic Advance and Sonic Rush series,
and the day-time stages of Sonic Unleashed.
The team, located in Japan, was founded by former SNK employees and
has also worked on Street Fighter IV, the Dragon Ball Z: Budokai
series, and the Japan-only DS game Tales of the Tempest.
Sonic the Hedgehog 4: Episode 1 is set for a summer release.