Base a movie off the Ebberon setting.
It makes the entirety of the Forgotten Realms blush in its cloak of stereotypical fantasy.
Get a party of a Korranberg Chronicle reporter, a mage/investment manager from one House, a bard from House Phiarlan, a player from Thuranni, a warforged gone rogue in every sense of the word, and an airship pirate [http://www.youtube.com/watch?v=YPH1OoTobtk] on whose ship they all crashland into the Mournlands, blown off course by a mysterious manifestation of planar energy as one of the planes becomes coterminous. Of course, the mage needs a Quori trying to Mind Seed him.
Or you know, just follow a group of Dark Lanterns, as they uncover a scheme to bring the world to war again, with one House apparently aiming to start the war out on top. Of course, the spies will have to infiltrate deep into more than one court to find but a single man manipulating things towards a collision. And he's Brelish. Will they be able to extricate him and bring him to justice without anyone being able to smear the Brelish crown with his mad scheming?
Possibilities, as they say, are endless!