One of the reasons fan speculation makes my job difficult is because many people do not understand the difference between fan speculation and news, and in a world where bloggers blur that line all the time, things spread and become fact, whether they are or not.
For the last year or so, it has been "common knowledge" that the first stand-alone "Star Wars" film was going to be about Boba Fett. I've seen that printed hundreds of times now. I've seen people discussing it as if Disney had announced it. And I'm sure for many people, they absolutely believed it as fact.