Expect a shakeout among the 9 US Airways Express carriers and Eagle once AA and U merge. I think Eagle (well, part of it) will still be a player and perhaps several of the U feeders will consolidate, but unfortunately, I don't think there will be a seat for everyone when the music stops. 6000 pilots currently involved in this scenario and I'd expect about 4000-4500 to make the cut.
The question is who ?
Got large RJ's ?
Your odds go up.
Senior at your carrier ?
Your odds go up.
Survivors should expect marginal compensation akin to what will be imposed at Eagle though, but it will take time and so most will remain employed for awhile and who knows, perhaps attrition will mitigate the damage, but I don't see the lagacies doing much hiring in the future, especially AA/U as we'll probably have a shortage of seats for all as well and have our own furlough issues.