I was not happy with Rob Zombie changing Michael Myers' back story. I feel that his childhood should be left alone. Although, I am a purist of horror movies and usually get itchy when people do remakes. But I must say that I do have faith in Rob Zombie and would never wish him (or any other director) death.
Now, although I do not want a remake which is shot-for-shot like Psycho, I do not like remakes which completely revision the story and throw away everything (that is if the movie worked well the first time). This is one of the reasons I was not a fan of the remake of Texas Chain Saw Massacre. However, (and I am sure I speak for all) John Carpenter's The Thing was a brilliant remake which kept many aspects from the original movie in them. Now, do I think Zombie's change of Michael Myers' childhood is a mistake? Personally... yes. Do I think he will do a horrible job revisioning of a classic? Of course not. I have a lot of faith in Rob Zombie and have enjoyed his films; personally I own House of 1,000 Corpses and Devil's Rejects.