Working on the script with original screenwriter Michael Arndt was, he admitted, "a struggle," and "then they decided the script wasn’t coming along fast enough. There were people being hired and money being spent, and Michael stepped away," leaving Abrams and Kasdan to create the screenplay themselves.
The two had a clear idea of what the new Star Wars needed, thankfully. "The feeling we wanted was from the first trilogy, which was, it’s fun, it’s delightful, it moves like a son of a bitch, and you don’t question too much," Kasdan explained, going on to say that he and Abrams agreed that "we don’t have to do much of anything. We know that we’re gonna have Harrison and Carrie and Mark back. We know we have Chewie. But everything else is up for grabs."
He went on, "Maybe J.J. felt different, but I didn’t feel any parameters were imposed on us. On the first day, I said, 'look, delight, that’s the word. In every scene, that should be the criteria we’re using. Does it delight? Is it fun?' I look at the movie now, and I’m feeling very good about that."