Scott D. Pierce: Marvel's superhero team 'Defenders' is a slow burn on Netflix

Superheroes have been teaming up in the comic books for more than 75 years, so it’s no surprise that Netflix is giving us “The Defenders” — a lower-budget way of creating a TV version of Marvel’s two “Avengers” hits and DC’s “Justice League” (coming in November).That’s not an insult. Hey, I love TV. But even Netflix — which continues to spend mountains of cash on programming — can’t afford to do a series with a b