I will confess to being a bit naive when I came to launch a career in Hollywood back in 1991. I started in the mailroom of UTA (United Talent Agency), with other post-grads looking to make copies and messenger scripts in hopes of landing on an agent’s desk. I also started reading scripts voraciously, and had a blast doing so.

But one of the most important things I learned was in a book by famed screenwriter William Goldman (“The Sting,” “The Princess Bride,” and many, many others) titled Adventures In The Screen Trade. Many old-timers will know this, but it is repeated throughout the book:

“Nobody knows anything.”

Simply put, he means that no single person can say with any certainty what will and won’t succeed. Every time a movie or series is proposed with a seemingly can’t-fail cast, director, premise, whatever, a few go down in flames.

Which brings me to “Batman v Superman.” Iconic comic heroes in a effects-laden extravaganza would appear to be a no-brainer. Yet, after a very impressive opening weekend, it seems that Warner Brothers may be changing its tune. For every one of these, there’s a “Sixth Sense,” “My Big, Fat Greek Wedding,” etc. Thus proving William Goldman’s prophetic phrase.

Words I will never forget… and neither should you.