Peter Jackson's journey through his adaptation of "The Hobbit" has been unexpectedly long, as what was intended to be a two-part project was broken up into three movies. The first two, "An Unexpected Journey" and "The Desolation of Smaug," opened in 2012 and 2013. The final installment, "The Battle of the Five Armies," opens December 17. By now, Hollywood's proven that massive franchises aren't all bad, and the form has become so commonplace that studios are able to plan their movie release dates years into the future. So if you're curious about what you'll be watching in theaters come 2019, here's a hint: You've already seen it.