Check THIS out!
That's from the brand-new "Irving 3 Newsletter Issue 1 - Fall 2009" .pdf, available here. In case it's not immediately obvious from the picture (or if you're reading this in the future), with emphasis added by me:
The Irving-3 DFW Extension Project is currently under design and will consist of two phases.
Phase I follows SH114, crosses Airfield Drive and then hooks into Terminal A (see the map of the Orange Line extension). This route offers a direct ride from Dallas through Irving/Las Colinas to the airport.
Phase II will create an extended loop up to the North Station area near the Cotton Belt rail corridor. The alignment will turn south into Terminal A. The second phase will connect commuter rail along the Cotton Belt rail corridor to the DART LRT system.
The newsletter goes on to say:
At the same time DART is developing the Irving-3 extension, the T is moving forward on the Southwest-to-Northeast Rail Corridor (SW2NE) project. SW2NE will utilize the DART-owned Cotton Belt rail corridor and is expected to provide commuter rail service to Terminal B by 2013. The terminal stations will connect light rail and commuter rail passengers and DFW Airport employees to the Terminal Link and SkyLink systems.Wow. Wow!
The North Station area will be a new transportation hub for the region creating an opportunity for new development on airport property. With connections to DFW Airport and the future Cotton Belt rail corridor, transit riders will have even greater access to jobs and places of interest throughout the metroplex.
Edit: Just found the thread that deals with the Orange Line/DFW specifically, so I'll add this there as well. That's probably where the implications need to be discussed, since it won't be built in the same phase as the part that's currently under construction.