I'd be shocked if there were no season in fall 2021 (even if it looks different from the past) - I think that the NCAA will do everything it can to play fall 2020 sports in spring 2021 (of course, perhaps not every college can absorb the facility use) and then back to normal for the 2021-22 academic year. While I'm not expecting a vaccine in the near future - or even at all - I believe there's a reasonable expectation of therapeutics being available. Coronavirus is not a new thing (we've known about them for more than 90 years), even if Covid-19 is a novel coronavirus. The more conservative scientists that I try to listen to (small "c" conservative) give me some confidence. If there are adequate therapeutics, we still may not return to "life as we knew it" but there will be a bit more normalcy w/in continued efforts to reduce transmission. If that happens, I think sports will be on although it may be w/o 100,000 crowds for football or shoulder-to-shoulder fans at a college soccer game at UCLA or Stanford.
More ominously, and even if things are closer to normal in 2021, if there can't be any football for the entire academic year, I'd expect there to be a complete reshaping of college sports. The NCAA is losing so much money (March Madness '20 + Football '20 + March Madness '21) and the specific athletic departments are already struggling - it's hard to imagine a scenario in which scores of sports are not dropped or the # of scholarships/sport reduced . If there is no football in the spring, I doubt there will be soccer in the spring and then I go back to what I wrote upthread: verbal offers may take on a different character and/or NLIs will be delayed since both the schedule and the $$$ available will become great unknowns. It really stinks all the way around.