JC Superstar WAS a good musical... it wasn't "scriptural", but it wasn't intended to be.
The movie "Noah" wasn't, either... but I enjoyed it, for the most part. I actually learned something that I did not know by watching that movie. I didn't know that the oldest man ever, Methuselah, died the same year as the start of the flood. Did he die in the flood? Possibly... but we won't ever know, I suppose.
The Passion is a very good, but difficult to watch movie. Is it 100% scriptural? Probably not. Should it matter? No.
The question I have is.... do you only watch movies that are 100% scriptural?