My prediction is that he'll see how things are working for a year. If he thinks keeping it the same is a competitive advantage, then likely no major changes. If he thinks he can get away with a devaluation (e.g., better than DL and UA, but not much better), he'll devalue.

There are going to be some notable changes for either AA or US once they integrate - there are different numbers of tiers and different costs for non-top tier upgrades, if nothing else.