Here are the criteria for this list:
1) Costume deviated so far from the source material (at the time), it’s hard to figure out who is being portrayed.
2) Has a hard time translating on screen.
3) Again, it has to be a person in a costume; 100% CGI doesn’t count (Galactus/cloud in FF2)
4) Disappoint the hell out of me when I see it.
* I’ll state again, these are not my personal favorites for the list, they are the ones that I feel are the most inaccurate.
So here they are, the worst of the worst:
10) The Penguin
Flippers and black blood. 'Nuff said.
9) Mr. Freeze
He looks like the love child of Dr. Manhattan and Optimus Prime.
8) Bullseye
Trench coats are not always the best costume choice (see reference: Smallville)
7) Red Skull
I guess Red Skull might have worn a latex jacket some times. Perhaps it was Domination Tuesday? That would explain the smile.
6) Juggernaut
I don't have the words.
5) Dark Phoenix
What the hell is with the trench coat shtick?
4) Green Goblin
Go, Go Power Goblin!
3) Dracula (Blade Trinity)
Again. . . trench coat. It's like a security blanket for costume designers.
3) Blackheart
Horrible. Just. . horrible. The worst part is that it had so much potential.
1) The Octopus
You take a villain that, after 60 years, has never shown his face and you. . . show his face. Largest deviation by far. To top it off, who would have known it he looked like Nick fury in drag all along?
That's where my list stands. I don't think I forgot any, but I'm sorry if one slipped my mind. If yours goes a little different, feel free to post it below. Remember, if we're going to try comparing lists, you should follow similar criteria. How much you dislike the costume has nothing to do with it; it's all about the accuracy.