If they do an even split profit sharing, AA will be the only airline that does it that way. All the other airlines do some kind of weighted measurement based on salary and hours worked. Otherwise, you'll get minimum wage, part time workers making as much profit sharing as pilots and middle managers, who work more and arguably contribute more.
I'd expect something similar to what the other airlines use...and I would expect the typical pilot will receive more than $4200. No, not DAL-like $20K payouts, but still a respectable sum considering a month ago, profit sharing earned us $0.