Here's a wallpaper depicting the final major villain of 5D's, Z-one. For awhile we all thought that Z-one was actually an evil and twisted version of Yusei from the future, but in the end he turned out to be some guy who tried turning himself into Yusei. It was the second biggest rip-off of the series, the biggest rip-off being that Yusei and Aki didn't quite end up together. They came so close with that scene during the final episode, but it still remained unresolved. Can't there be one Yu-Gi-Oh! series that has a resolved romantic relationship between the characters? There's certainly room for romance in the Yu-Gi-Oh! franchise. Sorry, I needed to vent that.
Anyway, I think that it would've been way more interesting if Z-one actually DID turn out to be Yusei. Still, he's not that bad, as villains go. He tried to become a hero to save the world, but in the end he became a destroyer. Well, enjoy.