Zoe Saldana is reprising her role in the next installment of "Avatar."

The actress said she got emotional after watching footage of "Avatar 2."

"Avatar 2" suffered delays in its production due to technical issues, script changes, and other setbacks.

Saldana plays Neytiri, a Na'vi figure from an alien species.

She and her lover Jake Sully (Sam Worthington) must figure out a means to save their planet from a familiar invader.

"Titanic" star Kate Winslet will star in "Avatar 2."

Other actors in the film include Jamie Flatters, Britain Dalton, Trinity Bliss, Bailey Bass, Filip Geljo, Matt Gerald, and Jack Champion.

Fans expect the showrunners to release a trailer in the coming months.

Avatar 2" will premiere in theaters on December 16.