From what I read about it the coaster is going to be a family-friendly attraction & will be housed inside of Soundstage One.
I think a coaster like the one below but in a darkened room with a forced perspective and sceans in blacklight (Think Peter Pan ) might be a trill ride for little ones and a fun adventure for adults alike.
This is a coaster from Carowinds and I think the Monsters Inc, coaster may be a lot like this one (without the water of course!) & about the same size.