We just had a thread about this a couple weeks ago. Plenty of renovation opportunities.
- Widen outer concourse out to the pillars
- Johnnys expansion (this is already in the works)
- possibly add suite\loge seat options.
- redo the ceiling, especially in the middle, add LED lighting (projection too would be nice)
- replace the seats entirely (we did a cosmetic half-fix about 10 years ago now)
- new videoboards (also approaching 10 years old now)
- a thorough cleaning of all concrete inside and out might be a good idea.
I dont see a complete rebuilding ever happening. The costs for that would be just astronomical. It took us how long just to get the SEZ rolling, imagine how long it'd take to get a project 10x the size rolling.
U of Phoenix stadium (home of the Feb 1st SuperBowl) recently changed to all LED lighting. Saving a buttload of energy of course but they also claim a noticeable improvement for HD and especially Slo-Mo.