95% of changes are completely unnecessary especially when it comes to changing a characters origin from the one his or her creator made for the character. It would be like you coming up with a character, that you sweated you artistic heart over, and someone like me coming over and me changing the character's race, gender, or planet of origin. I would basically be disrespecting your artistry. I would basically be saying screw you but my version is better even though I did none of the work when it came to creating that character. As for costumes, yes costumes may need to change for a storyline but the costume should always go back to what it was. Again for the reason's I mentioned above. It be completely disrespectful to creator that came up with the costume in the first place.