All the best superhero movies have two things in common, they are:
1) Stand alone films and 2) Establish or begin the sustaining myths.
Which means the most fulfilling are usually the first ones in a franchise like “Iron Man,” “Captain America: The First Avenger” and “Wonder Woman.” It’s where the escapism is pure, the pleasure is in discovery and there is a bracing sense of new things being explored.
“Black Panther” is all those things and a social phenomenon as well.