Well, if anyone else didn't know already, ubisoft has been working on a new Rabbids spin off adventure game. It doesn't feature Rayman at all. YAAAAAAAY
Why is that a good thing, you ask? They've finally decided to separate the two worlds. The rabbids are living among the humans, and apparently want to live on the moon now. Look it up, there's a teaser trailer out now.
Anyway, the real good news is that Rayman WILL have his own adventure games back. As seen in this interview- [link]

"IGN: Why did you decide to omit Rayman from the experience altogether?

Jacques: Not a day goes by without somebody asking us for a new Rayman game… He'll be back for more imaginative and fantastic adventures of his own before you know it, but not in RGH, which takes place among Humans.

In the meantime, the Rabbids really like it here in the real world and are here to stay… That is, unless they make it to the moon! But rest assured that the Rabbids and Rayman are still B.E.F. (Best Enemies Forever). They'll no doubt meet again... "


Of course, that last line kind of scares me. "They'll no doubt meet again." Please, PLEASE don't do that.
But, the first step has been completed, the two series are finally separate and we can hopefully have a brand new Rayman adventure.