Rotten tomato reviews have little correlation to movie quality it seems, especially superhero movies. I thought Dr. Strange and The Avengers movies were horrible. Logan and Deadpool were great.
Keep in mind that a Rotten Tomatoes score is just a ratio of positive reviews to negative reviews. Black Panther has a Rotten Tomatoes rating of something like 95% right now, but that might mean that 19 critics gave it 2.5 stars out of 4, and one critic gave it 2.0 stars out of 4. A very "meh" movie can get a very high RT score provided that most reviewers agree that it's at least a mildly entertaining "meh".
Apparently it's a major cultural event now when a superhero movie features a woman (Wonder Woman), or black Africans, these characters are several decades old I don't know why people give a **** but whatever floats your boat.
The characters might have been around for many decades, but nobody has ever actually made a movie about them that made any money. Before Wonder Woman, the last female superhero movie was a Supergirl movie sometime in the early 1980s, and it did so poorly that nobody has ever tried again. As for a black superhero, there's been sidekicks like Falcon-Suit Guy or Replacement Iron Man Guy, but never the lead. Unless you count "Blade", but probably most people didn't even know Blade is a comic book and just thought it was a movie about Wesley Snipes beating the crap out of vampires.
The notion that you could make a Black Panther movie or a Wonder Woman movie and people would actually go to the theatre and pay money to watch it is a relatively recent discovery for Hollywood, and one that goes against decades of conventional industry wisdom.
-k