Steven and Karen spoke about the challenges, pitfalls, and rewards of working with other writers on a particular project. What collaboration boils down to is rewriting another writer's work. There really isn't any magic formula. The point is to rework the story into a great script. Collaborators are brought in to deepen the scenes, punch up the dialogue, energize the action, add more tension, or make the characters more interesting and colorful.
Collaboration can be a good thing.
It can also be a disaster. And unless the original writer can stay attached to the project, he or she will have little if any control over the end product once the rights are sold. It's like buying a house and then reconstructing the windows, walls, and floor plan. Karen believes that collaborative writing is best achieved by working with like minds. It's important to choose co-writers wisely.