An Ubisoft representative told Digital Spy that the Wii U version is not having any issues with development that would cause the game to be delayed.
"There are no issues with the game development. All of the information was in the press release, the only reason for the delay is to release on multiple platforms," Ubisoft public relations specialist Sarah Irvin said.
However, Ubisoft has released games on one or multiple platforms ahead of others in the past, so an Xbox 360 and PS3 release would not necessarily mean a delay for the Wii U version.
In response, Irvin added: "We usually release all of our platforms simultaneously (aside from PC). We've made special exception sometimes in the past but it's definitely just on a case by case basis and not our standard practice.
"In this case, Ubisoft recently decided they wanted to release the game on multiple platforms so the decision was made to launch them all at the same time rather than separately.
"I know it's not an elaborate, 'convincing' answer, but it's the simple truth."
Rayman Legends was originally announced as a Wii U launch title, before being delayed to March.
Earlier today, Ubisoft revealed that the game will also launch on Xbox 360 and PlayStation 3, and that all three formats will release in early September.
> Wii U hands-on with third-party titles: Zombi U, Rayman Legends, more
Watch the Rayman Legends E3 demo below: