I think what he's asking is, say in the class those Mesaba/Compass guys are actually in (in 3 months) have different assignements. Can they pick from those?

I'm not being clear - here's an example: this class has no 7ER slots. So the Mesaba/Compass can't pick that. But, lets say in 3 months the class they show up for DOES have 7ER slots. Can they bid those? Or are they stuck with what they picked earlier?

Here's a question - An AE comes out between their "phantom" class and real class date. Can the Mesaba/Compass guys bid that and get awarded something from that?