I have been a comic book fan since childhood when my dad would take me and my sisters to the local drug store to peruse the offerings after church on Sunday; something I'm sure the priests would not have approved of.
"Powerless" would have been a welcome addition to that ritual although I'm positive it would never have been considered at that time.
The concept is simple: the world has superheroes from the DC Universe and some that haven't been created yet, I'm assuming. I'm at a disadvantage here because beside the big marque characters I haven't followed a lot of any comic book series for a while. "Jessica Jones" was new to me although I did remember "Luke Cage." I can't honestly tell you what DC has been up to - but "Powerless" is a fun step!
In this world, as you can easily imagine, there is a lot of collateral damage in any superhero/super villain fight. Marvel has already covered this somewhat in "Jessica Jones" a heroine who lives in a post-Avengers battle world where superheroes aren't loved for the destruction they've instigated while saving the world. Supervillains are one thing, yo; getting to work when entire blocks are closed down due to buildings falling is entirely another.