Unless
Pearl and
Yamaha have some sort of semi-exclusivity agreement with them, I bet Quantum goes with the Randall-May carriers, at least initially -- they already have system that works with tubular tension casings, they work with pretty much all bass drums, and the Quantum consortium can design their own tenor frame as long as it uses J-bars.
Whether they would stick with RM afterward would probably depend on their capability to come up with equivalent carriers at a lower price point -- those tubular carriers ain't cheap!