When it came out in 2009, " Cloudy With a Chance of Meatballs " quickly became part of a growing class of well-reviewed, successful animated movies made outside the Pixar machine. Now Sony Pictures Animation is looking to keep the weather system churning. A sequel that has been in early development at the studio is getting a new push, with John Francis Daley and Jonathan Goldstein, the writers of this weekend's release, " Horrible Bosses ," coming on to write a draft of the script, according to a person familiar with the project who asked not to be identified. Though the first film was loosely based on the 1970s children's book of the same title written by Ron and Judi Barrett, the sequel will be based on an original idea, not the Barretts' follow-up book, "Pickles to Pittsburgh," the person added. Phil Lord and Chris Miller are not returning to direct the sequel; instead, the producers are set to hire a director who had worked in a lower