The only one of those three that even makes sense is MCO as a 7ER VB. The reason I see MGT wanting a VB is in a large "focus city" like MCO or BOS with a lot of ops with the same equipment. MCO could support a small ER base where management had the luxury of flexing up or down their staffing needs without displacements costing them money and back flow in the training department. (That is why JB wants this and I don't blame him. If I had any hope of being based at home for even part of the year, and not commuting, I'd be all over this.)

BOS also makes sense. We have lots of domestic flights on the 757, plus the international flights that we do there. In the summer they use A330's and 764's but there is enough service for a small base if management has the discretion of shrinking it without penalty. I also see a seasonal A330 base in MSP. Possibly even PDX, PHL, 7ER for the summer.

I haven't been to DFW in a couple years but from what I remember, we only have 2-3 gates and don't have common equipment flying in and out of there, same with ORD. Every narrow body aircraft we own makes an appearance daily, which isn't conducive to a pilot base. Look to the airports with a lot of the same type flying in regularly. Like CVG and the A320.