I think we have a bunch of really good points here. The only thing I can add is the ripple effect.
Let's say a movie is a pebble dropped in a lake.
Those closest people to the center feel the ripple the most.
Those would be the hardcore fans that are close to the material.
Now, further away from the source (pun intended), the ring gets bigger, but also less intense.
Mid-ringers (lol) would be people that have seen the original, but don't remember much besides the gross events and the kool factor. These are barely fans "Hey I read that as a kid!" "Oh, I saw that cartoon/show/movie as a kid!"
Far-ringers (lol some more) would be people that know of the franchise, but are barely aware. They are just familiar with the thing.
We all think, when they grab a license or reboot a franchise, it's for the HARDCORE, who know every detail, own the series, just read it/watched it last week.
It's not.
It's for the Mid-Ringers because they are the most numerous.
The near-ringers are going to see it no-matter-what so you don't need to really worry about them.
The Far-Ringers will only go see it if it's proclaimed a hit first.
It takes an amazing effort to balance between all three.
They put the villain in movie one even though they didn't show up till much later.
Why? That's the iconic villain the Mid-Ringers remember.
When it comes to fans who are REALLY into something, they think the small details that THEY didn't even pick up on- until the fifth watch are the main hubs of the story that everyone else should be locked into- on the first watch.
As I said, you have to cater to all three and do it well to ...get it right and make a big enough $plash.
Do you want a small hardcore base to see it 2X or the larger group to see it once and enjoy it.
Make it too hardcore and you'll be shoving in a bunch of scenes that confuse people.
Stray too far and it becomes linked to the franchise in name only.