I think Jack Nickolson could have done just as good of job as heath. but Tim Burton kinda blewit. becouse in most of jacks movies he dose do a good job of acting like a scary crazy person.
the joker realy was created by the batman droping him into a chemical vat. it died his skin white, his hair green and his suit purple. while in the chimical ware house something blew up and cut his mouth. just before batman droped him. the joker then made his way to a cheep surgeon who did this to his face to try and fix it.
the joker stays with the batman till.... i won't spoil that part. the question is now who coud play the joker? and only one person comes to mind... Johny!