What just happened

My question is, what happened to the question mark?  There are posters for this movie all over London at the moment and every time I see one I can’t help but be annoyed.  Actually, Ang and I had a discussion about the title today and decided that it could have been a partial sentence stating a fact.  As in “let me tell you what just happened”.  I had to agree that this was feasible, even though it still didn’t really make sense.  But I knew deep down that there should have been a question mark and wasn’t, there had to be.

So imagine my delight when we returned home and I looked up the film on Wikipedia – it was based on a book called “What just happened?  Bitter Hollywood Tales from the Front Line”.  See the punctuation?  I certainly do.  I do love being right.

So that brings me back to my original question: what happened to the question mark?  Who decided that there shouldn’t be one?  Was there a discussion at the film studio about what looked best, what made most sense, what the public would understand?  I doubt it somehow.