I just can't see an omnimover happening, and here are my reasons
1. The park does not have a high enough daily attendance to justify the cost. Even on Disney's bad days they push 15,000-20,000 through each park.
2. What would they theme it as that would draw any type of media/attendance? I have always said, if you were to build the rides that Disney has in any other park, you could not pay people to ride them. The rides are not thrilling, they tell stories, stories that millions of people know and have grown up with.
3. Have you seen the size of these things? Fire in the Hole has nothing on the building size.
I understand the want, but you would be disappointed in the results of an HFE omnimover. Not that they could not build one, but it would be millions down the drain with no ROI. SDC would be much better off with a revamp of FITH or FM or even another non looping family coaster. I would honestly like to see a 4D theatre with the SDC story. Same theme as your omnimover but actual enjoyment out of it via the movement of the chairs, water sprits, air poofs, and such.