It won't be a thrill ride but it will be a trackless dark ride. GMR may seem like a D ticket today but it was definitely an E when DHS opened.
Wouldn't mind seeing them bring Remy's ride over from Disneyland Paris with a little more oomph. I'd be happy if it was just a typical dark ride instead of another thrill ride and if they're going to go with an IP theme I hope it's Pixar related.
If I remember correctly they talked about closing that whole side of the park with Indy and everything and scaled back because they realized that would make DHS a literal wasteland?