Each truck holds 7-9 passengers that all have to be buckled into a 5 point harness type thing. Incredibly slow loading, I bet Monster beats it. Expect very long waits even with a short line.
CP had several demo trucks out that the kids could climb into and sit in and sold $15 wood models the kids could build there as well.
I would say KI has a good chance of being one of the other 2 CF sites yet to be announced. What is left: WOF, MA, CGA, CWL, KI, CW
They can bolt on whatever type of muffler they choose to achieve the level of noise they desire.
EDIT: Just saw Carowinds is getting it so only one slot left.