A user by the name of Fancy Father is making a fan game based on both Rayman AND the Raving Rabbids and he is trying to connect the two to explain why the Rabbids and Rayman went their own ways.
And another link explaining why he is making said game. The bottomline is that it's a demo pitch to see if such a game will become a fan game for the fans to try out. It's gonna be a platformer with some beat-em-up style movements.
So it's going to be interesting if some fans have heard of it or not? Might put this in the Fan wiki for Rayman under fangames cause this would be good when it comes out soon.
That's very little information for now, but the artwork looks very promising, and I'm intrigued by the idea, so I look forward to more updates about this.
Very intriguing! Even if it's "just" a demo, I hope it delivers on some small fraction of the promise shown by the game's development in the mid-2000s…