If we will see trains I'd put my money on us seeing something like Cheetah Hunt. Multiple small trains. CH has 5 trains of 4 each holding 16 riders. Using that it achieves (Or at least does if Busch run it efficiently
) 1370 riders per hour. That's roughly around were all the other SW coasters manage. We'd want at least 1000pph on something like this though to ensure the queues are reasonable.
I think that could be likely what we'll see here, though maybe less trains depending on blocks.
One advantage of using several small trains though is that the queue would be kept moving rather smoothly. Just look at Th13teen. Though it can get long queues if there are no breakdowns it eats through it rather well and you're not stood still for too long. One of the main holdups there is the queueline shop, if that was scrapped it'd be much better.
This is why I like rides like Duel, Rapids, The Flume, and Th13teen. You don't really feel like you're in a queue as it's always moving forwards at a good rate. Even when the queues are long you still 'flow' much better than other rides.
If we are seeing a ride which uses trains then a dual station like Air probably isn't out of the question. If we're seeing shuttels though I still think we'd be seeing dual loading like Oblivion and Saw. Doesn't CH use dual loading though? I guess train length permitting that wouldn't be out of the question.