9. Avatar
Like its sequel, even the first installment took its own sweet time to come to the screen. Avatar was first worked on by Cameron in 1994 and was to be filmed after Titanic. But things did not work out due to limitations of technology. Cameron decided to wait to perfect his vision, and the movie revived in 2006. Filming began in 2007 when James was satisfied with the technology, and the superhit movie hit theaters in 2009.
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Edited by Sangeeta Mathew