There is no shortage of pilots in the USA, and there will be none, either.
There may be less then desired amounts of applicants for low-paying regional jobs, but none of this will affect the majors, which should have no problems finding bodies.
About 50% of all US airline flying is done by regional carriers. The majority of its pilots strive to get to the majors, therefore the majors should experience no problems finding pilots and a steady supply from the regionals.
The regionals however may have a harder time finding willing people to work for 20,000$ a year under a crap contract when the majors start taking more people in.
Aside from a few decent gigs out there, this "career" is as good as dead in the Western world.