daveed at 2010-12-17 10:48:25:
First of all, hats off to Brock for completing a thorough treatment. They are a pain in the ass to do, but they help reveal enough of the story to see what might/might not work.
It also lets you play around with the story without having to do rewrites in the script -- though that will sure as hell come later.
A lot of thoughts come to mind as I read this, the biggest of which is, "Why should we care about these characters?" This dovetails w/ Scott's questions about who's story it is, who is the protagonist, what are the stakes, and so on.
Secondly, all the characters seem too likeable, which doesn't lend itself to dramatic conflict. Thus, who is the antagonist?
Can Bill and James be rivals instead? The young upstart versus the old man being put out to pasture? It's a rivalry that can be concealed at first, and whomever is the "bad rival" is entirely up to you. It could go either way. What series of circumstances put James and Bill on their current collision course, against their wills? The point is, the story needs some heightened conflict.
Play with your characters more. Give them weird, unique quirks, shortcomings. Maybe Bill drives the house (I assume a trailer house) because he's deathly paranoid setting foot outside.
Don't be afraid to test your characters and put them through the paces (or make them do horrible stuff to others). (In an early draft of one of my scripts, my protagonist was so despicable and unlikeable, I eventually made him the antagonist and turned the person who was initially a sidekick, a character I adore), into the reluctant hero.)
There's too much easy bonding along the way. Road trips test people to their limits and force them to confront shit they never anticipated. If they enter the trip voluntarily, then conflicts arise that make them question their decision. If forced to travel together (eg Planes, Trains and Automobiles), they have to overcome their initial hostility and find some sort of cooperative relationship if they're going to make it.
Maybe James is forced by the college to chaperone Bill for some reason. Make it hard for your characters to do anything and they'll come more alive in trying to achieve their goals. Or Bill tricks James into accompanying him so he can steal his manuscript idea. But that's a different story than Bill getting his wife back.
To that point: the women seem ancillary/unnecessary to the story. Do you need a romance subplot for James? How does Aja help or hinder James in reaching his goals?
Finally, we're back to what the story is about: a romance, a buddy movie, a road trip movie? If it's about a guy driving his house to win back his ex-wife (definite shades of knight-errantry here, to potentially good effect), then the focus is less on James. Indeed, you may decide to make him the antagonist.
If it's James's journey we're following, that spine has to be made apparent in the logline and concept.
In sum:
Find your hero
Find your story
Make work for it. :)
Good luck!