I think if they merged it would be like TWA and American where the regional flying would stay the same. When AA bought TWA they were responsible for TWA's contracts. That's why CHQ flies for them now. So i'm not thinking much would happen.

On another note did anyone read in the USA Today Money section where Delta ALPA pilots are ready to strike if they try to merge without union authorization? Didn't take long for the union to get hot on this issue.