LOL
Going with The Matrix as an example of a movie that only explains to you what's happening in a 5 min sequence is hilarious. Did the rest of the movie just fly by your head?
It spends an enormous amount of time establishing the Universe, characters, rules and roles.
By the way it's not about the audience being intelligent, it's about the audience caring. And the audience won't care for Aquaman or Wonder Woman if they know next to nothing about them. Batman and Superman are going to greatly overshadow everybody else to the point of turning them irrelevant. That said it's called Batman vs Superman, so it makes sense.
Quicksilver isn't a character, he's a plot device in DOFP, and it's by and large most people's favorite scene in the movie.
They throw in an easter egg to hardcore fans about his relationship to Magneto and his little sister, but the movie never even bothers to explain how they find him, or why he's not helping in the final fight.
Audiences simply do not care about origin stories explained in exhausting detail.
How many people that saw Avengers actually watched Ang Lee Hulk or Incredible Hulk, two underperforming flops? And yet, they got the basic run down, he's a smart guy who turns into a monster when he's angry. Here, watch him CGI smash stuff.
The Joker never had an origin story in TDK. He just shows up one day, and he's the Joker, and he hates Batman. He's a great character, who's obviously a bad guy, so the audience roles with it.
If they show WW flying in and catching a truck falling off a bridge, everyone is going to recognize "Hey, that's Wonder Woman. Hey, she can fly. Hey, she's pretty strong." Whether she endears herself to audiences is based solely on whether they give her something interesting to do. The concepts of Atlantis and Greek Gods are well ingrained in Western pop culture. I think Sam Worthington made a living exploiting both.
I find it ridiculous after a decade in which some of the highest grossing films were LOTR, Harry Potter, Transformers, Avengers, Hunger Games, Twilight, Batman, Iron Man, Star Wars, Avatar, and stupid LOTR prequels, we're still here, in 2015, worried about whether audiences will accept Wonder Woman and Aquaman. We should be past this. People go to the movies to watch impossible shit happen. No one's going to walk out of a superhero genre film and go "How come that guy could hold his breath underwater for so long? How come that other guy was faster than Superman? None of this makes sense!"