I keep seeing people claim that the Infinity Saga was a perfectly built long term plan and that Marvel today has lost its ability to set up major storylines. The more I revisit the early films the more this feels like revisionist history shaping the narrative. A lot of what people praise as careful planning looks more like ideas that were later fitted together once the scope of the MCU became clear.

Thanos is the best example. He appears for a few seconds in the Avengers end credit scene, then he does not show up again in a meaningful way until Guardians with a “even bigger baddy” cameo and later Infinity War. That is not deep setup across multiple films. It is one tease and then a long gap. Yet today people seem frustrated if a post credit scene does not pay off almost immediately.

Loki’s scepter is another thing for me. The stone changes color across films until Marvel eventually decides it is the Mind Stone. There is never a clear explanation for why Thanos would give an Infinity Stone away to Loki. It reads like a retroactive choice that happened once the writers committed to the later Infinity Saga direction.

This is why I think people are being inconsistent when they fear that something like Doom or Secret Wars lacks setup. What we have right now is already more substantial than what Thanos had in his early years. There is a post credit scene with Doom interested in Franklin (a cosmic being, who they spent the whole movie hinting at his unmatched potential) that ties directly into a plot element rather than a silent smile from space. That seems like more groundwork than the Infinity Saga actually had at the same point in time. Calling it no buildup feels like revisionist history.

I am curious what others think. Do you feel like the Infinity Saga was genuinely planned or did it grow and shift as the studio adapted. Am I missing examples either support or challenge the idea that Doom or Secret Wars has comparable build up to IW or EG.
Infinity War was not Greatly Setup; Doomsday has buildup (Revisionist History Discussion)