I rewatched the Matrix trilogy last month, on 4k Blu-ray no less (but apparently without a subwoofer, which hurts my soul in retrospect), so that I would be prepared to say whether or not The Matrix Resurrections was a giant retcon, and whether it was a bad retcon, and whether it was a good movie. And I do have opinions on these points!
But first, a few words about makeup and set dressing. I appreciated that the omnipresent dark green drear was replaced by nonstop blues, representing of course the blue pill seen on the right. I won’t go into specifics, of course, but I liked the way the truth of the Matrix was kept while jettisoning the old color palette, and I liked that this occurred for a good in-story reason. As for the makeup bit, upon reflection it would be a pretty big spoiler, so I may bring it up later. But, I was equally impressed with someone’s job there as well.
Anyway, in order: it was not a giant retcon, and it was also not a bad retcon, by virtue of the retcon not being the one I expected. A retcon certainly occurred, but I approve on the whole. It’s the kind that reveals how the world really was always this way and we just hadn’t noticed, not the bad kind that gets a writer out of a dumb corner they could have avoided on either the front end or the back with no real trouble, had they but tried. And it was a good movie if you accept that all the fun being poked is at itself for existing and not at you for being suckered into paying for it to have existed. Or if you forgive all that because it used White Rabbit really well. (Man I love that song.)
The rest, below the spoiler cut.