Well here is something what I found on wikipedia when I was searching 'new rayman gam in 2010' and I think it is fake. It says:
Development Of Rayman Advent
Michel Ancel And Hubert Chevillard Are Going To Create A New 2D Rayman Cartoon With New Characters Including Red And Orange Haired Raymanians Who Ressemble Rayman And A New Enemy Darkacron. The Directors And Producers Of Teen Titans Transformers Animated And Ben 10 Alien Force Are Going To Jumpstart The Production Of The New TV Series And The Creators Of Rayman Will Intitle Rayman 4 Revenge Of Reflux In 2010 The New Cartoon Will Air On Cartoon Network And Will Be By Warner Bros Animation.
Here is the wiki page http://en.wikipedia.org/wiki/Rayman_(series) .