There would be no cramming, the space is bigger than people give it credit for. After all, they DO fit an entire house within the space for HHN. Remove the facades (sorry Snoball), palace theatre & Mels, you get even more space.
Gee... its not like Disneyland doesn't have multiple dark rides next to each other. Oh right, it does. So not a valid negative.
**EDIT: haha
@saint.piss having the same Disneyland thought process
Transformers & PETS are great examples of utilizing small footprints by building vertically. They'd be stupid not to do the same with this area.