So it looks like Jason Blum is taking the reigns on the "Dark Universe" or whatever the hell they are calling it.... that would actually make the future Blumhouse of Horrors mazes interesting!
Creative has nothing to do with HHN. You're thinking Entertainment/Art and Design.
EDIT - And the new park is getting designed from the ground up with Diagon-level immersion. It's also not going to have six soundstages available. HHN will remain at the Studios.