Hilarious as besides Tower of Terror, Disney's biggest answer to fixing MGM and AK for the first decade was Rocknrollercoaster and Primeval Whirl.
A 90 second coaster is also exactly what Disney's first MK net gained attraction since Splash mountain in 1992 was.
EPIC has a GREAT opening park line up, even the hub has attractions. Universal tends to use their expansion plots. This is the first park designed with these large of expansion plots inplace.
I think within five years of opening you will see a Luigi's Mansion and another attraction.