They won't "take" anyone. They will do it the way every other airline mans its aircraft.

There will be a system-wide bid for however many positions in each seat -and everyone will decide if they want to bid it. At the end of the bid period, there will be a bid award to those who bid it and whose seniority allows them to hold it. It could go pretty damn junior, relatively, based on the type of flying involved. . . . and the fact the company will probably try to 'cheap out' on the pay rates.