Well the real test is the NFL. They are the richest league and the greediest owners/businessmen anywhere. They will fight this tooth & nail. And they will push to still have football without fans since they make a ton on TV. The players will follow in lock step, since they won't organize against it even if there are health risks.
College football is in jeopardy. If they don't allow students back on campus, it is over. They won't take the NFL approach. I assume that decision probably comes by 4th of July. Right now I put the odds at less than 50-50, but I really can't see colleges opening themselves up to the risk of having dorms & large lecture halls filled with kids from all over the country, the communal cafeterias, etc. unless more treatments are developed by then. Too much risk.