Naturally! The chaos the world was thrown in when the Heart of the World exploded is horrifying - Piranhas have proliferated, Zombie Chickens were born, all magic folk are slowly losing their power. The Glade's inhabitants have been reduced to slaves and their robot overlords have created bastions of their own on the surface.
I wonder how long everyone thinks Rayman's been in that cell. At first glance, you'd only think a couple of months, maybe. But look at it this way: the Pirates have been able to infiltrate every corner of the Glade, building machines, contraptions, placing Cages, erecting forts and laying down patrols. I think we're not talking months here. Rayman's been locked in there for years, I pose.