I think a lot of planes - including ones incoming and already promised - are going to ACTUALLY go to whoever can staff them appropriately and fly them profitably.
Look at what Alaska did to their wholly owned Horizon when Horizon staffing got so low they had to take a 30% cut in their flying last fall - AAG cut a 12 year contract with Skywest.
I don't think it really matters who has been promised what - nobody is going to let a half billion dollars worth of aircraft sit around underutilized if there is someone who can utilize them more profitably. For the next five years with the major airlines hiring their butts off to cover mandatory retirements, the ability to recruit and staff is going to be critical. I actually doubt that a lot of regionals will be up to it, frankly. The ones that are may survive.