I think it was a custom layout made for Disney. Mainly because there's only one other version of this ride (as far as I know) and it came after RNRC. I think an off-the-shelf model would constitute something like an Arrow Corkscrew, which was all over the place.
Exclusivity of track layout is something purchased. That Disney opted not to purchase exclusivity suggests they likely had little involvement in its design. Somebody is always first to buy an "off the shelf" design.
We don't know to what extent WDI was or was not involved with the design, but even assuming they were not, that doesn't mean that the layout wasn't designed with MGM Studios in mind and presented to Disney first. The "off the shelf" expression implies that the item being sold is 1.) already available for purchase and 2) offered to anyone. Given Vekoma's long history of debuting new ride concepts with Disney, that doesn't seem to be what happened.
Superman The Ride opened less than a year after Rock 'n' Rollercoaster. That means Premier Parks bought it while Rock 'n' Rollercoaster was still under construction. It is a lot of ifs for Disney to commission a layout, not involve themselves and not retain ownership of the design even if just for a limited period of time.
Makes as much sense as the US Tax code....
Yeah, UoE has been sitting there completely empty for quite some time now. It seems like they could have been much further along with that by now. Although maybe that situation with the support beam caused delays. Also, is it just me or does it seem like they haven’t installed any more exterior panels on the gravity building since like a week and a half ago? Like they just stopped halfway through.
Maybe they have to wait for 1Q of 2019 to continue funding...
/thread.
