Just my opinion, but I think it is very unlikely there will be 2020 season. I would change my opinion, obviously, if a vaccine or effective therapy is discovered in the next several months. But, from what I read, that too is unlikely to happen.
The head of the NCAA has already stated that if colleges don't have students back on campus in the fall, there will be no NCAA sports. Why? I think because the optics would be terrible. In addition to the liability issues. The colleges and the NCAA would essentially be saying its too dangerous to have students on campus, but its OK to expose the athletes. It's possible that most colleges will figure out a way to have students back on campus this fall, but that is not a sure thing by any stretch.
So, let's assume the colleges reopen and have students on campus. Everyone seems to think that most or all of the athletes will gladly commit themselves to a situation where they are being potentially exposed, on a daily basis, to the virus. I am not confident that will happen. Some--maybe even most will, but that is a personal decision for them and their families. Some will opt out.
Assuming you get a critical mass of players who commit to play, there are the logistical and other issues of how you even manage a season. Given the current attitudes toward mitigation, players would have to be constantly tested. If a single player on a team is found positive, pretty much the entire team would have to be quarantined. For 14 days. Any team that the quarantined team had played in the prior few days would presumably have to be quarantined as well. It looks to me like it would be a constant "start, stop, cancel" situation that would be impossible to manage.
I mention the "current attitude toward mitigation" above for a reason. The only way I see the 2020 season not going down the drain (other than a vaccine or effective therapy) is if there is a total sea change on public attitudes toward the virus and what we should do about it. I personally think we have overreacted to the virus and adopted policies out of all proportion to the real health risks presented. But, even a significant minority of people who are risk averse will be enough to keep the policy makers from green lighting a season, given the obvious difficulties and potential liabilities.
Naturally, nobody is going to make this call until they absolutely have to. The economic results of not having a 2020 college football season will be catastrophic for athletic departments. Some smaller schools may have to get rid of sports altogether if this happens.
I would like nothing more than to be wrong about this, but given where we are medically and from a public attitudes standpoint, I just don't see it.