Kotaku have received images from an anonymous tipster who found them in a survey from the marketing firm Arkenford, who are a regular client for Ubisoft, that appear to confirm the existence of a Rayman Origins sequel and even showing that development could be well under way already. Though Ubisoft are yet to confirm or deny this, so it is best to take this all with a pinch of salt for now.
The game however did receive rave reviews from critics and successfully managed to turn a profit for Ubisoft even if the sales never took off that well, so a sequel was very likely to appear at some point anyway, but it was not expected to appear so soon after the release of the original.
Although the sales were not amazing, the game itself provides an extremely solid platforming experience, including various paths through levels, some of which can only be used later in the game, plenty of well hidden collectibles, time trials and 4 player drop in drop out online play. As you can see the game has a lot to offer, so a sequel with slight refinements and new features aplenty could really stand out from the crowd of high quality platforming games on the market currently.
The survey shows that the game will be taking a different direct for the setting, instead of the wacky, yet wonderful world Rayman Origins was set in, the sequel could well be set in a more mythical setting, filled with castles, ghosts, dragons and greek gods. The screens taken certainly appear to back this theory up. You can check them out at the bottom of the article.
Bare in mind that this could all be a big hoax until Ubisoft at least make some form of statement, but I would consider it is worth noting that the art style in the images is so similar to the style used in Rayman Origins that for this to be fake would require the work of a fairly talented artist.
Hopefully Ubisoft will add some clarification to the legitimacy of the issues soon.