There "should" be scope clauses, but not in this case. The scope clause of the purchasing airline's pilots would override any liquidating group's scope clause. In other words, if Spirit is dumping airplanes, and Frontier is buying them, the Frontier pilot scope clause determines who flies the new airplanes.

I'm not aware of any ALPA group that has such a stipulation: "If the company obtains aircraft from another operator, that operator's pilots will be integrated into our seniority list in a fair way and not be stapled to the bottom of our seniority list."