Couldn't agree more about the big 3 legacies, my guess AA in particular is going to lose the most and therefore hire the most. I would think anyone who gets on with any of those carriers will fly up the list. Pretty much has to after the huge gap since they hired last translates into a very old seniority list.
Hawaiian has laid out that they will go from a list of about 650 to a little over 1000 by 2020. Not sure how many retirements we have, but one thing that will keep anyone from getting too stagnant is they hire all ages, up to pilots being hired in their fifties. So their won't be a big block of all young pilots when the expansion slows. But we sure won't be hiring at the rate the big 3 will.