Not sure if United is running classes. The gouge on this site is that they will be hiring 450 in 2018. But that qualifies as rumor I guess.
Any chance ORD is so senior at AA that it might become junior shortly? I.E., is it so top heavy that it will be hit first and hardest when retirements start happening in earnest in a few years?
I have never looked at the airline online tools for pilots so I don't know how much visibility you have when you go online to bid. It might be an impossible question to answer.