UPDATE: Ubisoft has confirmed that the two costumes will unlock "after 20 minutes of gameplay".
ORIGINAL STORY: The Wii U version of Rayman Legends will include unlockable Mario and Luigi costumes with which players can use to dress up Rayman and Globox, Nintendo has announced.
Nintendo also confirmed that the Wii U game will feature unlockable stages from Rayman Origins, a game which wasn't released for Wii U.
Ubisoft has previously said that the Origins levels will be updated with Legend's new lighting engine and touch controls for Murphy the fly. The stages will also be available on other platforms.
Rayman Legends releases on August 30.
Source: Press release