You're not thinking 4th dimensionally... just back it some type of bridge for the attraction in order to keep the existing frankenstein escalators and drop off area
And hey now, our mummy here is great. Just because they went cheap for the ending doesn't make it any less fun. Be thankful Murdy didn't welcome us back via video screen like brendan fraiser
You say consistent themeing, i say lazy unnecessary cloning (which was only cool in the 90s because the rides/attractions were better)This could allow for consistent theming across the parks.
I'll bet the ride will fit into the existing building...which we have seen can have limiting factors on experience quality for USH (Mummy anyone???).
And hey now, our mummy here is great. Just because they went cheap for the ending doesn't make it any less fun. Be thankful Murdy didn't welcome us back via video screen like brendan fraiser