So, 'Back to the Future II' doesn't actually predict the Cubs will win the World Series
Sorry to burst the bubbles of Cubs fans, Back to the Future fans and fans of sheer randomness, but I’ve got some bad news for you: The second movie in the trilogy doesn’t actually predict that the Cubs would win the World Series in 2015 (something that’s growing less likely in our current year, but is still technically possible). Oh, it predicts it in the 2015 to which Marty and Doc originally travel, but if you’ll bear with me through some high-level nerdery, you’ll see why said prediction was only made within a timeline that no longer exists in the world of the film.
Okay — and you’re going to have to bear with me here (Cubs pun!) — so Doc, Marty and Jennifer go to 2015 from 1985 because something has to be done about their kids. Doc knocks out Jennifer and then tells Marty to go into the Cafe ’80s to stop his son from making a disastrous pact with Biff’s grandson, Griff. Marty looks around, sees the hologram news feed of the Cubs beating Miami in a sweep, meets the old guy who wants to save the clock tower, discusses the baseball news in which Marty is surprised by Miami’s existence, not the Cubs winning, to which the old man says the line that sets the whole plot in motion: “I wish I could go back to the beginning of the season and put some money on the Cubbies.”
The win is even mentioned in the next day’s USA TODAY (the Cubs swept in five, suggesting MLB had moved to the old best-of-nine Series format). It also gets little publicity in the paper, suggesting the Cubs winning wasn’t as momentous as it would have been this year or that baseball is no longer a huge sport. I mean, it’s under the Slamball playoffs beginning, for Great Scott’s sake! But, in this timeline, the Cubs did win the World Series over Miami. That part is completely true.
However, sensing a good idea that will quickly turn evil, Marty buys the sports almanac, old Biff sees it, then steals the DeLorean to go back to 1955 and give it to his younger self. Automatically, that creates the alternate 1985 timeline, in which Biff is a Trump-like billionaire who earned it all off gambling thanks to the almanac. At that point, in order to save humanity, Marty and Doc, who were surprised to find out about their hellish new 1985, have to go back to 1955 to keep old Biff from giving young Biff the almanac and get regular 1985 back on track.
They of course end up doing just that, but while they’re celebrating, the DeLorean gets hit by lightning, Doc goes back to 1885, Marty realizes 1885 Doc is eventually killed by Buford Tannen over a matter of $80 and Marty decides he has to go to the old west and save Doc. So, back to 1885 he goes, there’s all that nonsense with Mary Steenburgen and, eventually, Marty gets pushed by the train to 88 mph to return to the regular 1985 whereupon the DeLorean is immediately crushed by a real train. While on his way back to the tracks with Jennifer, Marty avoids the drag race with Needles that would end up affecting his entire life.
more...http://ftw.usatoday.com/2015/10/back-to-the-future-2-doesnt-predict-cubs-will-win-world-series-timeline-1985-2015
= new reply since forum marked as read
And since Miami is a national league team, there can be no Back to the Future world series. But we can't let a technicality like that ruin it for us, can we? 
Just sayin'! Couldn't just let us have our fun, now could you? 
Besides, i don't like the sequels of that franchise so i just had to take a contrary position.
