Ready to venture "Into the Unknown"?

Disney revealed more details about "Frozen 2" at this weekend's D23 Expo, including two new songs (the aforementioned "Unknown" and one titled "Some Things Never Change").

Directors Jennifer Lee and Chris Buck also teased new characters, including the parents of Elsa (Idina Menzel) and Anna (Kristen Bell).

“As you know, in these Disney films — I’ve been guilty of it — we tend to kill off the parents, but we’re bringing them back,” Buck joked, to which Lee clarified, “For a scene!”

Evan Rachel Wood will voice Queen Iduna, Anna and Elsa’s mother, in a flashback singing a lullaby about a distant, mystical river full of memory.

Also joining the cast is Sterling K. Brown as the present-day Lieutenant Mattias, the leader of a group of Arendelle soldiers  trapped for 30 years in an enchanted forest.

That enchanted forest will be a significant setting for much of "Frozen 2." As Lee said, it is "a place of transformation where change comes for you whether you like it or not. Relationships are tested, everything you thought you knew proves to be wrong, powers that were once too strong for the world are suddenly not enough, and it’s easy to get lost.”

The filmmakers also previewed a scene featuring Elsa, Anna, Kristoff (Jonathan Groff), and Olaf (Josh Gad) playing charades until Elsa hears a voice in her head and leaves. Anna, worried about her sister, doesn't notice Kristoff trying to propose to her.

That scene leads to Elsa singing "Into the Unknown," a power ballad that seems destined to be the next "Let It Go."

"Frozen 2" opens in theaters November 22.

For more coverage from the D23 Expo 2019, click here!