ABC's 'Frozen' TV adaptation is perhaps one of the most-awaited TV series to premiere this year. With Disney's original 'Frozen' movie grossing over a billion dollars in earnings, 'Once Upon a Time' has the upper hand when it comes to attracting 'Frozen' fanatics for its upcoming Season 4.

Broadcasting giant ABC has already announced that the fourth season of the fairy tale drama 'Once Upon a Time' will be air on September 28.

While the network has disclosed that 'Frozen' will be part of the 'Once Upon a Time' Season 4 storyline, they did not say how prominent the Disney blockbuster will be in the series.

However, some reports claim that show will follow the 'Frozen' story arc whenever the hit fairy tale series adapts the movie's plot into its own. Fans of both the TV series and the film are surely excited about this change to 'Once Upon a Time'.

During the 2014 International Comic-Con in San Diego, the 'Once Upon a Time' production team treated its fans to its first Season 4 trailer, featuring Queen Elsa and Anna in the first scene of the series, where the siblings were noted to be visiting their deceased parents' graves.

'Once Upon a Time' regular cast members include Jennifer Morrison, Robert Carlyle, Lana Parrilla, Josh Dallas, Colin O'Donoghue, and Emilie de Ravin will be joined by Georgina Haig, Elizabeth Lail, Scott Michael Foster, Tylor Jacob Moore, John Rhys-Davies and Elizabeth Mitchell in the highly anticipated 'Frozen' TV adaptation.

Watch the San Diego Comic-Con 2014 'Once Upon a Time' Season 4 Promotional Trailer below: