Nope.

But without a collective bargaining agreement with actual protections the JB pilot group is seriously disadvantaged in a merger with any legacy airline. It's not just a UAL issue. Without a CBA with solid successorship language it would be trivially easy to complete a non-operational acquisition of JB assets and offer "job opportunities" to selected JB employees, if even that. That's the stick that any legacy has in working out a deal with JB.

Voting ALPA was a major step forward for JB pilots but the ball is not across the line (yet) and the "status quo" employment agreements were specifically written to both disadvantage JB pilots and make JB more valuable as an acquisition target.