Update: A new press release from Ubisoft has changed the date to September 3, not August 27 as the earlier Online Challenges release stated.
Oh, how you tutted and sighed when Ubisoft delayed the Wii U edition of Rayman Legends into September just so it could launch alongside its newly-announced Xbox 360 and PS3 siblings. The monsters! But hey, good news. You won't need to wait too far into September as Ubi has now said the delightful jump 'em up sequel will launch on September 3.
The release date was curiously something of an afterthought for Ubi, casually dropped into an announcement about the Wii U launch of Legends' Challenge Mode demo today.
The Rayman Legends Online Challenges app is out on the Wii U eShop today.