Buck, 54, revealed how he and co-director Jennifer Lee are planning to change snow queen, reported Aceshowbiz.
"We're working on the sequel right now. Jen (Lee) and I are getting back in the room and we've got some cool ideas coming up," Buck said.
When asked about the ideas the helmer dodged the questions saying that it is fun to work for the film and the characters again.
"I can't divulge anything, but for us, Jen and me, it's been so fun to get back in the room and be with these characters again," he said.
Describing the scope of playing with the character of Elsa the "Tarzan" filmmaker said the way the part one ended left a lot of space for them to re work her personality.
"(In Frozen) she had such a dramatic journey, and at the end she's just starting to feel like she can open up and have some fun again. That's what was really good about the short - we could have fun with Elsa. And that personality... You will see in the next one.
