In a perfect world...
Weren't the ECC campuses all going to be placed at the city campus, closing down the north and south ones?
Well, there's your parcel of land for a new stadium... ECC South. You have the parking that's needed right across the street.
Have the same company that built Rich Stadium or have HOK build you your new 85-90k seat open-air stadium running along Southwestern Blvd. I would like to see a similar design as the current stadium, with two upper decks, blue seats in the upper decks also (no benches)... copy the large endzone scoreboards like they have at Baltimore's M&T Bank Stadium. Have a "Rockpile" section of benches on the upper part of each endzone.
Before that, before you construct a new stadium... get an independent analysis of the current stadium and its shelf life. Have HOK, HTNB, Ellerbe Becket and HKS conduct an examination of the current structure and see how much longer it has. Then you go to the county and you iron out a new lease agreement. And then you give the middle finger to Jerry Jones, Bob Kraft and Danny Snyder.... and Bud Adams.