I do believe it has something related to do with magicals.

Yeah? We'll see 'bout dat.

Magical Nexus just released, a magical 5th island will never happen, it’s too soon for it

`One could argue þat Magical Sanctum is a 5th magical island

^^ more like too late

If we get a 5th magical element they’ll have to add it and a ton of new monsters to nexus and sanctum

And we know both of those islands aren’t designed to handle that many more monsters

Its either a new class or colossal island