It looks like a sequel is coming for Frozen, however, not in the form anyone was guessing. Random House has announced they will be publishing a slurry of Frozen chapter books for the young readers that will continue the current movie’s ending.
Random House plans to publish 3 to 4 books a year. The first two titles of the sequels, Anna and Elsa #1: All Hail the Queen and Anna and Elsa #2: Memory and Magic, will be released January 6th, 2015 and will continue were the film left off as Anna and Elsa become closer as sisters. Books #3 and #4 will continue later in 2015 .
Erica David, who has written licensed books adapted from How to Train Your Dragon and Legend of Korra, will write the sequels.
Source: The Hollywood Reporter