Pixar Talk reports that final writing credits for Cars 2 and Hawaiian Vacation were provided at yesterday's press event at Pixar, as follows:
Screenplay by Ben Queen
Story by John Lasseter, Brad Lewis, and Dan Fogelman
Screenplay by Gary Rydstrom, Jason Katz, and Erik Benson
Story by Erik Benson and Christian Roman
Cars 2 is Ben Queen's first movie screenplay and his first work for Pixar. He previously worked as a writer and executive producer on a handful of television series. Queen is also the author of The Art of Cars 2.
Dan Fogelman received sole writing credit on Disney's Tangled and co-wrote the screenplays for Cars and Disney's Bolt.
Erik Benson, Jason Katz, and Christian Roman all worked on Toy Story 3. Katz served as head of story; Roman as a story artist. Benson started off as an intern and was soon recognized for his talent and hired full-time. (Read this article about him in the Victorville Daily Press.)