"Back to the Future" Really Was?

If any of you remember the movie "Back to the Future II" you will recall that Bif goes to the future and steals a Sports Almanac, where in turn he goes back to the past to give it to young Bif. As we all know Young Bif was able to become very wealthy by betting on games where he already knew the final score. In an obscure line you hear young Bif says, "Florida is going to win the World Series in 1997, yeah right."
This movie came out in 1987, ten years before the Marlins did actually win the world series. And what's really weird is that Florida didn't even have a baseball team in 1987.