The 2020 NFL schedule release could be delayed by a few weeks to make extra preparations in case the coronavirus pandemic results in a shortened season. 

Per NBC Sports' Peter King, there is "momentum" for the schedule to drop in May:

"What if the NFL has to truncate the season, perhaps go from 16 games to 12 or 14? If so, the league would likely want most of all of its division games played in total, and the league would likely want to be sure every team had an equal number of home and road games for each team. Of course we won’t know if all of that is going to happen by the first week of May, but we will certainly have a better idea with three weeks more lead time to make the schedule official."