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

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

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

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

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

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

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Avatar 2" will premiere in theaters on December 16.

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