#1 Catwoman. Catwoman is a Batman villain, but in the Dark Knight Rises, she teams up with Batman to beat Bane, and they even seem to fall in love by the end. She is just misunderstood.

#3 Maleficent. She is all bad in Sleeping Beauty, but in Maleficent, she is just misunderstood, because some jerk stole her wings.

#5 Captain Hook. He is Peter Pan's arch nemesis, but in the upcoming Pan, it looks like he teams up with Peter Pan to defeat Black Beard.

#7 Godzilla. Similar to the T-Rex, Godzilla used to be the one destroying our city and the one we were scared of. Now, he is coming to help us! Thanks Godzilla!

#8 Terry Benedict. In Ocean's 11 he is their enemy. In Ocean's 12, he comes after them the whole movie for his money back. However, in Ocean's 13, through a classic "enemy of my enemy is my friend' scenarios, he helps the main characters in their scheme.
#9 Simmons. In Transformers 1, Simmons is after the protagonists the entire movie. In the second one, they have to team up with him.
What other characters are bad in the first one and good in the next one? Let us know at www.facebook.com/SimpleFilmCritics.