If Delta has 1000 on the streets they will fight tooth and nail to keep another hundred or more employed and fly either 100-seat EMB-190's or 107-seat 737-200's.
Comair, ASA, and other regional captains are equally afraid of J4J programs. Yay, Delta pilots are back in the cockpit, albeit after kicking a CMR pilot to the street.
The question boils down to, "Who pays more dues to ALPA?" combined with, "Who makes up ALPA leadership, 'mainline' or 'regional' pilots?" The answers to those questions will dictate the contracts since ALPA is the one doing the talking for both 'regional' and 'mainline' pilots, correct?
As for the actual outcome, economics will play the deciding factor. Who flies the 100-seaters cheaper?
This is my informed opinion after reading this thread. Yes, I'm still a CFI. No, I have not applied to fly for Comair. No, I don't know anybody at Comair or Delta. No, I don't pay dues to ALPA. What a difference a little objectivity makes. Flame away.