Now, I would have liked it if this movie had been made, but did not actually restore interest in Superman. Maybe then people would appreciate Superman Returns a bit more.
Maybe had this been made, and it essentially was, like Superman Returns, generally dismissed.
Because it would not have been good. But it would have been interesting to have seen.
EDIT: It blows the hell out of the JJ Abram's Superman. There were plenty of unproduced Superman movies. This, and the Kevin Smith script are very sadly the best you can get.... Technically, Smith's script was supposed to be the basis for this, but Burton decided to go in another direction.