The Nashville Fairgrounds, where the new 30,500 seat soccer specific stadium will be built, was the site of a groundbreaking for the new exhibit halls which will replace the current run-down stock located on the small hill where the stadium is to go.
Per
WSMV....
The site plan....
Replacing this....
The stadium is reportedly under design and presumably should not begin construction until the exhibition buildings are complete. The Fair Park, where the youth soccer fields are shown, is near completion.
A recent joke of a law suit by the dying remnants of the opposition was dismissed last week and didn't slow down the progress one bit.
(Correction; the court ruled against an injunction to stop work on the project. The trial will continue with a hearing scheduled for November 30, 2018.)
The plan is for the USL team to play in the baseball park one more season, then the MLS team will play in 69,000 seat, Nissan Stadium for at least a year starting in 2020.
The speedway will be upgraded (I don't have details) and there have been some talks with interests trying to bring a minor league version of NASCAR racing to the track.