The current combined AA and U would include 10 regionals with about 600 aircraft and 6000 pilots. Personally, I don't think the combined carrier will need that many RJ's going forward. Therefore, one should anticipate consolidation, elimination and streamlining of feeders. Since the future combined AA/U is unlikely to hire for awhile while everything shakes out, a surplus of regional pilots is even more likely then mainline.

Which carriers (and pilots) survive is the question there. Already entrenched with larger RJ's would seem to improve odds. Large numbers of smaller RJ's or strictly old turboprops would seem to reduce them.

I think that Eagle's 47 CRJ's will remain, but the EMB's will be replaced in part. Those replacements won't all return to Eagle though, so at least SOME of that future streamlining will come at Eagle's expense.