the last I heard of Blade was that it was going to be a cut-rate production and that "the story at one point morphed into a narrative led by women and filled with life lessons, with Blade relegated to the fourth lead" but that was apparently dropped? I don't follow Disney/MCU like at all, but I came across this story and it stuck with me because it was kinda bizarre.
And The Hobbit (respect to Del Toro for giving up before it was too late).
And Justice League (even if, after Dawn of the Dead and 300, Snyder never did a good one again).
Arcane was in production hell for like 6 years and according to the documentary on its making the story got scraped and rewritten at least once. Sometimes it works. Arcane is so good.