I know a person that's on the Nashville Metro Sports Authority board and I spoke to him this week....He showed me photos of the new soccer stadium there out at the Fairgrounds...Very nice stadium and one of the biggest in the USA.
He said almost certain to build a new dome stadium. Current one needs over 500 Mil upgrades and repairs...Doming it would add $320 Mil on top of that. Building a new one would be around 1.4 billion.
Edit: Of course that 1.4 billion would be around 2.8 billion by the time it's said and done as usual.