N is for Nebula

ABCs of Mediocre Marvel Villainy

Okay, so to be fair, Nebula is a super feared space pirate, the grand-daighter of one of the most feared beings in the galaxy, Thanos.

but she doesn't ever do anything.

She stole the Infinity Gauntlet from Thanos when he had it (awesome) but then, despite having the most powerful weapon in the universe. I mean, we're talking about somethign that allows you to do WHATEVER YOU WANT. She was defeated by Starfox. Who would definitely be the S in ABCs of Mediocre Super Heroes.

Then she went to jail.

And I'm pretty sure for awhile there Thanos disfigured the crap out of her.

Also, N's are pretty thin for choices, and I felt bad at the lack of women to this point.