The Instagram post above comes from Michel Ancel himself, and he seems interested in creating a 4th installment in the Rayman franchise. There was the original Rayman, Rayman 2, and Rayman 3, and then a bunch of spinoffs and stand-alone games. Cool to know he has interest in continuing the proper franchise.
I hope Rayman 4 doesn't take place after Origins and Legends and follows after Rayman 2.
Those games made Rayman look like an idiot and have gameplay balancing issues making them less fun than Rayman 1 and 2. I love those games and I was disappointed that Origins and Legends didn't live up to even 3 which was fairly good.