Interesting site. He uses some publicly available data and generates future UAL pilot staffing. This was from Feb 2012, so I'm not sure if the new contract or new FAA regs fit into this. He claims UAL is understaffed by 600+ pilots. Not sure when that is.

It also uses known aircraft deliveries and retirements.

There is also an interesting seniority calculator. When I put hired in 2013 it said pilots hired this year would hit the 50% overall seniority in just 12 years!

United Airlines - Audries Aircraft Analysis