One of our readers, and a reliable industry source, has confirmed that the survey to the Rayman Origins sequel is real, and shared with Gameranx the following description of the video shown to survey participants.
He describes the game as having a "darker, almost watercolour art style." He also added that the game uses more 3D models than the first game, which relied heavily on 2D art.
"It had video showing a darker, almost watercolour art style that's not as saturated as the first game, and it seems to use more 3D models on a 2D plane (they still look kind of 2D, but for example there was a bit where a big-ass dragon came up from the background and it was definitely a polygonal model.)
"It also had another video showing online modes in the form of challenge levels where you compete for scores or times in specific challenges," he said of the game's new challenge modes.
"The two [the video] showed were a simple race and a bit where you were falling down a vertical shaft and had to collect as many Lums as possible before you hit the bottom."