Honestly I understand why movies change comic book character. Comic book characters where made for comics but to translate them to movies your gonna need to change them for a couple of reasons. 1. Half the time an arist can draw something that doesn't even exist or can be done.(ex Wolverines hair is much longer in the books and more pointy but well they can't make Hugh Jackmans hair that big). 2. Comics are usually a very selective market but movies in general are made for a much wider audience and to do that they need to make the character more basic. (ex losing a costume or making it less exotic like Iron Man's armor or turing the X-Men uniforms all black and not specific to each team member. But a good reason to change some of the comic book characters is that its more interesting to see these characters in a whole new light. Refreshing what you thought about them and making them more modern, most good comics where made decades ago and most people don't like things that stay old and don't change. But n the other hand changing the characters is risky as you end up ruining the character, but the bad to side to that is its only ruined to those who already knew the character and not the average person who doesn't know squat about super heroes. So I think its kinda mixed and it depends just on what the idea is and what they're changing.