restructuring Seasons 4 and 5 due to the virus
I feel like there are two ways it can go. This can also go for a lot of shows effected.
1: The episodes that should have ended the season can be the beginning of next season. This would feel a little off-balance, opening a season with a crescendo, but it could work.
2: They do next season as planned as possible, and what we should've seen at the end of this season become storylines that are merely referenced as off-screen events, or maybe flashbacks.
Personally I prefer option 1, it also would have the bonus of cutting out filler from Season 5, which I guess is the whole point. The end of the season is where the best stuff tends to be at, don't make us miss it, we can sacrifice some of next season's filler for it