First Harry Potter and the Deathly Hallows was split into two movies. Then The Twilight Saga: Breaking Dawn was split into two movies, the second of which comes out later this year. And then, just a few weeks ago, it was announced that Mockingjay, the final book in the Hunger Games trilogy, would be split into two movies, too.
Peter Jackson, who practically invented the multi-movie franchise by filming all three parts of The Lord of the Rings in one fell swoop, and who had already committed to splitting its prequel The Hobbit into two movies, apparently decided he needed to do something a little extra, just to stay ahead of the pack. And so, last night, on Facebook, he confirmed the rumours that had been swirling around last week, and announced that The Hobbit will now be a trilogy all unto itself.