Any chance AA adds more domestic routes to DFW, that might already have CLT or PHX service?
Some guesses, maybe
MDT-DFW. It is said that a lot of MDT traffic bleeds to BWI, and it's possible that WN is capturing some of that via BWI-DAL. An AA nonstop out of MDT might keep Central PA passengers to use MDT when traveling to Dallas, than flock down to BWI and have a choice to go with WN. And vice-versa, for those from Dallas heading to Central PA (Harrisburg-Lebanon-Lancaster-York)
CAK-DFW. Granted CAK is an alternate airport of CLE, but AA seems to dominate CLE-DFW. At a time of domination of CLE-DFW, it could hold it's strength with even with a 1x daily of CAK-DFW possibly. It probably wouldn't want NK adding CAK-DFW before it held it on it's own.
OAK-DFW. Another route that NK dropped like CLE-DFW. Now this is interesting, that if NK is out of the picture, it could be good that AA won't have to worry about a downward fare pressure from NK. However, if NK couldn't make it work with O&D passengers, maybe AA would have a problem that OAK is too much a regional airport for most passengers to consider flying far. WN might be an exception, that it can make some non-regional routes work. WN does fly DAL-OAK and AA's main competition would be WN AA could be able to capture some of that East Bay to Dallas traffic that WN might be getting.
With Dallas being a growing region, there is likely growing O&D from these secondary markets or sub-markets of large markets.
Which other markets might AA add to DFW, that might be already serviced by CLT on the East, or PHX on the West?