Balderdash though the story may be (nobody has these kinds of details about Shakespeare's life or methods), and despite Gwyneth Paltrow--though even I have to admit she deserved her Oscar, as did Judi Dench (though she didn't win)--I love this movie! For its vivid evocation of life in 16th-century London, of course, but chiefly for what it says about the challenges of making art out of life (and vice versa). About plausibility, the elastic between truth and fiction, when passions arise and collide, and--snap!--truth turns Romeo and Ethel, the Pirate's Daughter into Romeo and Juliet.
Speaking of plot evolution, I wonder what WS would do with this one: two lovers together briefly, joyously; then separated for nearly 30 years by necessity, distance, misunderstanding, bad timing, bad luck, bad choices--separated, in other words, by everything but the only finality: death.
Then comes the 180-degree turn--who knows what brings it on? What could account for it? (Here's the probability problem!) Gradually but steadily, bad luck turns to good; seemingly irrelevant yet right choices are made; distance collapses; they meet again. They say a few words, and the past dissolves; they see themselves in each other's eyes not as they are (distinctly middle-aged, a little crumbly around the edges) but as the young, vital, passionate, fearless lovers they still are inside--the people we all, always, are--even into old age. Nobody else sees it. But everybody does it; we all, always feel ourselves young.
Plausible? Nahhh. Never happen. Especially these days, virtue never triumphs. But what if it did, and this story actually happened--how would it come out, I wonder? What would Shakespeare do with it? Tragedy (always ends in death), comedy (tragedy without the last line; always ends in marriage), history (always ends in a question mark; cf. Hamlet)--those are our choices; his categories. And he's the one who taught us how to think about our lives. Not Milton, not Spenser or even Chaucer (though he goes a long way) or--god forbid--Wordsworth. Shakespeare taught us to recognize who we are. What would he make of those lovers now?