You can't have a hero without a villain. Here are my choices for best CB villains.
5. OwlMan
I never really cared much for OwlMan. Until I saw Justice League: Crisis on Two Earths. This guy had a plan: destroy the whole DC universe. He is basically and evil BatMan, and that already earns a spot in the top five.
4. Ultron
Ultron is arguably the strongest and smartest Avengers villain. His sole purpose is to take over the world and replace the human race with machines. It is revealed in the animated movie Next Avengers, Ultron destroyed Earth's Mightiest Heroes. That is an automatic in the top five.
3. The Shredder
The 2003 TMNT series brings an evil, powerful Shredder. He is merciless and is a master of martial arts. In an alternate future, he took over the world.
2. Venom
Venom is the nightmarish opposite of SpiderMan. A monstrous being, he took over New York in SpiderMan Web of Shadows.
And number 1 is.....
1. LaserMan
LaserMan is the sole definition of a villain. He is a leader, feared by everyone, cunning, calculating, and one of the most powerful villains of all time. He earns the number one spot.
And those are my choices.