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Ever since Ryan Reynolds was cast as the title character in Warner Bros.' Green Lantern comic-book adaptation, the film has shot to the top of the most-anticipated DC movies in active development.

But a new report today may be putting a bit of a damper on that particular production.

According to Inside Film, and a Twitter feed from Production Weekly, Green Lantern's "proposed Australian shoot is understood to be under threat after the rising Australian dollar has blown out production costs."

Martin Campbell (Casino Royale, The Mask of Zorro) is directing the film from a screenplay by Marc Guggenheim and Michael Green.

Filming was expected to begin this January in Australia.