MLS is mentioned, as well as the NFL, MLB, and colleges. The tax bill currently being considered could make significant changes to how stadiums are financed. The crux of the article is that tax breaks to finance stadiums may get eliminated, in particular, tax-exempt bonds. I did not notice anything to the effect that the owners would be able to keep more of their profits from a lower corporate tax rate, which should make up in part for the possibly higher interest rates. https://www.cnbc.com/2017/11/28/gop-tax-plan-threatens-big-break-for-stadium-bondholders.html
Sounds like one more reason why public financing will become less prevalent (if this passes of course).
With the money that the NFL, MLB and College Football makes, team owners should be funding their own stadium developments.
I don't think college football should be lumped in there. They usually do fund their own stadiums, because they can't effectively threaten to move.