2. Mr. Freeze
Who He Is: Let's be honest, if you're reading this, you know who Mr. Freeze is. But here's a brief explanation anyway. He began as Dr. Victor Fries, a former cryogenics expert who had an industrial accident, and therefore must now wear a cold suit in order to survive, keeping his body heat at an extremely low temperature.
Special Powers/Skills: Genius level intellect (seems to be a lot of those), he frequently carries a freeze gun to subdue his enemies (Sing it with me! "And with my freeze ray I will stop.... the world!")
Who Should Portray Him: Alright, while this guy has already appeared in a Batman film before, his character was handled so badly that he's due for a reboot. Admittedly, I think Arnold Schwarzenegger could have been a good choice for the role, had the script been better. Nonetheless, I think in a new Batman movie someone like Ralph Fiennes could carry the role well (remember, he has to start off as a scientist studying cryogenics). And now, number one!