I don't know if I ever told everyone, but I have several ideas of my own regarding Rayman in Smash Bros.
First off, I'll talk about the stage and how it works:
Wii U stage: Glade of Dreams (Rayman Legends)
This is a shifting stage, similar to the New Super Mario Bros U and the Pokemon Stadium stages, which is made up of the different worlds in Rayman Legends, including Teensies in Trouble, Toad Story, Fiesta de los Muertos, 20,000 Lums under the Sea, Olympus Maximus, and Grannies' World Tour. The stage will always start with Teensies in Trouble and will switch to the next segment after a certain amount of time has passed. Each segment will have their own mechanic, such as wind blowing in Toad Story to make fighters lightweight, and avoiding security lights and lasers when the stage goes dark in 20,000 Lums under the Sea, similar to the Gamer stage. Sometimes, different elements and enemies from the other segments will randomly 'Invade' the current stage you're fighting on now, just like in the Invasion levels. In all stages, a Teensie cage will occasionally fly by. Break open the cage to gain access to items. Also, a boss occasionally appear as an obstacle in the stage you're fighting in, such as the Mechanical Dragon in 20,000 Lums.
I'll post more of my ideas later on, as well as a better outline of my stage idea.