https://www.flightglobal.com/news/articles/american-orders-15-e175s-and-15-crj900s-448300/
Looks like AA has announced where the 15 175s and CRJ900s are going....
AA wholly owned companies.
Again when people were saying that the 20 currently flying for AA had been rumored to disappear earlier, circumstances were different. I think that they will go like the TSA and Expressjet birds, once their CPA is about to expire it will not be renewed.
Just one opinion, I'd like to be proven wrong, but I look at the industry, evaluate and speculate based on trends.