In that respect, Jackson would seem to be following in the footsteps of George Lucas, whose Star Wars prequel trilogy laboriously re-laid the groundwork for Episodes IV-VI, providing exposition for even the least essential detail (like who built C-3PO) of the future/past films.
In a way that An Unexpected Journey never quite managed, these attempts to turn The Hobbit into a Star Wars-style prequel to the Lord Of The Rings movies never feel forced – there’s a wonderful moment in Mirkwood where we see the Ring starting to exert its power on Bilbo, but the sense of doom always feels like something to be dealt with later.
He even gets Gandalf to play Middle Earth detective, the same tactic George Lucas used to occupy Obi-Wan Kenobi in Episode II of the Star Wars prequels.