Makes more sense when you realize DLRR doesn't have Lightning Lane. It's not profitable to have people experience the only good part of your new ride without having to go through a lottery or pay up 30 bucks.
Intamin's promo video shows the ride platform having a diameter of 18 meters.
Now if only there was a space, preferrably an empty one, at WDW that could fit a circular stage of that size...
You can add Goofy and Guardians for DCA and Falcon and the Monorail for DL. Honorable mention to the subs which have stairs in the vehicles themselves.