Is he not in this movie? That is good! I have been a little nervous about seeing it because of the way they often play Reed. They seem to always make the "smart guy" so aloof and cold as to be unlikeable. He's been like this in the comics for a LONG time now, and even some of the runs that the director cited as favorites are like that, where Reed is just a...well, let's just say "jerk" though other words would apply. I hate that so much, and it is not in line with his original character. I should have figured that the movies would make it better as they typically have when adapting questionable material, but still.
Traditionally, Reed Richards had graying temples and smoked a pipe. I like how they let Pedro Pascal's natural gray take over and obviously the pipe smoking wasn't going to work these days. I did a little research into the Fantasic Four, and Reed Richard's stretching power was actually inspired by Plastic Man, which originated in the 1940s.
Someone mentioned that you don't really need to know a whole lot of stuff about the MCU to see this. It is however useful to know a little bit about the Fantastic Four. Not necessarily expert level, but having heard about characters like Galactus, Silver Surfer, Dr. Doom.
I remember hearing about the 90s Fantastic Four that was produced by Roger Corman. It sounded like a disaster, but I suppose there are bootlegs of it even though it wasn't officially released. It was more or less TV movie quality. I understand that some actors from that movie made cameos in the new one.
And then there are all those superhero franchises inspired by the Fantastic Four. Obviously The Incredibles, although they kind of mixed it up. But then there was the whole family thing, stretching powers, super strength, and invisibility. Then a baby.
I like the parodies. Especially Professor Impossible from The Venture Bros. He was basically Mr. Fantastic with stretching powers and a genius scientific/engineering background. But then his wife (based on the Invisible Girl) can only turn her skin invisible. His brother in law (based on the Human Torch) painfully catches on fire if exposed to oxygen and is kept in an airtight chamber to prevent that. And then the cousin who is developmentally disabled, but still has a tough skin and super strength, but can't really use it and is hidden away.
Mr Fantastic from Multiverse of Madness was also a parody.