This story is a sequel to Mare Do Well vs Professor Nightshade
Worried about the possibility of masked heroes going rogue, Celestia and Luna pass the SuperPony Registration Act, forcing all heroes to publicly identify themselves and register with the royal guard. Which is rather silly as there's only two masked heroes in all of Equestria.
Perhaps even more silly is the fact that Rainbow Dash is unwilling to reveal herself as Mare Do Well.
This thrilling look at the world of superheroes explores a world where heroes are divided. Lines are drawn, sides are chosen, and costumes really need to be washed!
Whose side are you on?
Cover art cobbled together with vectors from the MLP Vector club on deviantart.