Here's my private hope:
You know how the FoTR opens with the Great War against Sauron on cutting the ring from him. My hope is that they do something similar, but with this story:
The story of how a hobbit invented the game of golf starts with a reference in "The Hobbit" book in chapter one "An Unexpected Party" relating to an ancestor of Bilbo Baggin's by the name of Bullroarer.
Bullroarer finds himself in the "Battle of the Green Fields" against the goblins of Mount Gram. Armed with a wooden club he charges against the goblin king Golfimbul. The blow from Bullroarer's wooden club knocks Golfimbul's head through the air for a hundred yards until it falls down into a rabbit hole.
The tale certainly explains some good origins on the beginnings of golf. Named after the goblin king "Golf"imbul, played with a wooden club, and the object of game to get a hole in one!
I imagine the movie starts out with Bilbo telling Frodo about the history of his own adventure, but it could easily incorporate an early history of Hobbits as well.
You'll see it's all a show, keep 'em laughing as you go, just remember, the last laugh is on you, and always look on the bright side of life!