Just because we "open back up" doesn't mean that a football season would take place. As we do start to open back up, whether that starts next week or sometime later, it'll be phased in and there will still probably be some restrictions for a while. Restaurants allowed to open but max capacity of 25, etc.
At this point, I'm leaning towards there being no football at all in 2020, or perhaps games being played behind closed doors. Given that many areas have essentially locked down right now, I can't imagine they'll allow 100k+ people to gather together in just 6 months time. Games behind closed doors would be much better than nothing though, although it'd be so weird watching college football (and all sports) on TV with no crowd.