In particular, the Wii version has been crafted "entirely from the ground up" by Ubisoft Quebec City and apparently "utilizes the full graphical capabilities of the Wii" in addition to "unique controls and capabilities" across its estimated fifteen hour run time.
A release date of May 18, 2010 and two new screenshots were also provided in today's mailing, though it's unclear if that release date applies to all versions--PC, PlayStation 3, Xbox 360, Wii, Nintendo DS, PSP--or just Wii. We're checking in with Ubisoft for release date clarification, especially as some retailers are listing the PC version for June. Originally, all versions were expected in May alongside the theatrical film.
Update: "All skus will be released on May 18," Ubisoft tells Shacknews.