And did I read somewhere that Gilbert is killed in the war? Which - I mean, yes, they had to do something timeliney about the fact that they'd dressed everyone in the first pair of movies something like twenty years ahead of how they'd actually have been dressed in the books? (I was just reading something over at AO3 about blah blah young women in the Edwardian era, and I kind of went ~blink~, yes, in through the movie door, never mind, and then the story was very nice.)

This is actually the first I've heard of the fourth one, and I now see from the Wikipedias that it doesn't even pretend to have a thing to do with the books - where apparently the third one believed it did (have a thing to do with the books, that is), and was just mistaken. (Again: I hear. As I said I've never actually seen it.)