Obviously these characters aren't the most expensive heroes to get together, but that's not what I'm talking about. What I am talking about is establishing a cohesive part of the MCU for the Netflix Defenders series.
These heroes are not just street level. Luke is also sci fi. The prison experiments done on him are still a mystery, so establishing Luke gives your street-level world a sci fi bend to it. It's like Weapons X all over again. Danny is not just street level, he's also fantasy. He adds plenty of fantastical elements to future stories like super ninjas and all that. Matt is the bridge between these two universes. His powers are from a science accident but his training is from a fantasy-type world.
With these three together, there is no such thing as a street level story you cannot tell. And you amp of every crime story you tell by 11--like Sin City.
And let's not even get into all of the cool storylines these three have under their belts.
If you can't tell, I can't wait until 2015.