More specifically, it sounds like the writers might take some liberties with the plot concerning Mary and her relationships. It’s possible that her life could also be “compressed” to some extent, skipping certain relations between her and some of her husbands. This has been hinted by some of the recent casting decisions as well, but it’s possible that the producers just aren’t telling us the full story.
Plus, with the way the show’s structure works, it’s possible that they could come back to this part of the plot at a later point, and fill in the gaps that will be created by season 4. This could actually set up the show for some additional interesting moments later on.
For now, we’re curious to see the depiction of the third husband of Queen Mary, who will be played by Adam Croasdell in season 4. His exact involvement with the plot hasn’t been revealed yet, but we can assume that he will be a major presence for most of this season.
There are some implications that the new season could close the story arc of Queen Mary herself, which would be a disappointing move for many fans, but definitely not an unexpected one. Not only that, but it could also give the producers some more freedom in redefining the show if they actually want to do that now, as the rumors imply. If they are trying to make it unique and with a defined identity, such a major change could be exactly what’s needed.