The buzz around the possible plot of "Frozen 2" continues as Disney continues their silence about the direction of the film.

Speculations claim that the sequel of the 2013 blockbuster hit animation movie will tackle a more mature topic, including the possible rivalry between Queen Elsa and her sister Anna. According to reports, the Arendelle sisters will be in an ugly spat with each other. However, the reason for their feud has yet to be revealed.

Meanwhile, an earlier report from Telegraph's Tim Robey claimed that the film outfit is planning to come up with a new song that could serve as the sequel's main song.

"I think they'll definitely try to position one song as a 'Let It Go'-trumping central number," the writer stated. "At a guess, though, it might be a duet between the sisters. They only shared about four scenes in the first film, so I feel more detailed development of that relationship has got to be the way to go."

Robbie Collin, another reporter from the publication, also speculated that the next duet between the Arendelle sisters will highlight their newfound relationship. "Possibly the sisters will sing a duet about being stronger together while they're being kept separate by some villain or evil force, taking verse about, then line about, and then coming together for a big, soaring chorus. Possibly I've thought a bit too much about this," Collin said.

The said duet will reportedly be composed by the film's original composer Christophe Beck in collaboration with Robert Lopez and Kristen Anderson Lopez.

While the plot for the upcoming film has yet to be revealed, it was already confirmed that Idina Menzel will return to lend her voice to Elsa together with Kirsten Bell, who will also lend her voice to Anna in the upcoming season.

Disney Films has yet to announce the official release date of "Frozen 2."