I have always wondered what made the Duke arena so highly regarded. On TV it reminds me of the Northwestern Welsh Ryan experience before they renovated it, with better student attendance. Those baskets hanging from the ceiling remind me of a high school facility. If I was going for a retro look, I would pick the Butler/ Hinkle Field House over it.
Would the good citizens of Durham be the target audience to fill the 15,000 seat Duke Basketball arena if one existed? My understanding is that the typical "southern" resident of Durham does not have lot in common with the average Duke student, much of any affinity for the university.
To get to that 15K number, maybe there is a lot of pent up demand by the good people of Durham NC to see their beloved Duke team in person, or charter flights full of elites from Greenwich, Boston, Martha's Vineyard and Manhattan to pack the place.
The Gopher stadium was engineered to allow 30,000 more seats without additional basic infrastructure, footings, ect so it is possible. It does not help the tailgating that the city and University in the Joel Maturi era did all they could to snuff it out when the stadium opened but.....