They would look like they look right now: Teaming with different airlines all competing for customers. A true market.
You would benefit by reading the link I showed Bubba. Ft Worth's Greater-southwest Airport. You'll understand the WA Amendment a little more. (Or at least you should, corndog kool aid blurs your vision) Feds weren't going to fund two airports for Dallas and Ft Worth both, so DFW was built. You guys weaseled your way into staying at Love and keeping it open.
This is a pretty funny post on your part, because it's obvious to all that you actually know NOTHING about the Wright Amendment whatsoever. Nothing. it must be your hate of Southwest that blurs your vision.
Bubba