The 62-year-old director cited the example of the "Terminator" and "Alien" franchise to drive his point home, reported CNN.
"It was a seven-year gap between 'The Terminator' and 'Terminator 2: Judgment Day', a seven-year gap between 'Alien and Aliens'. It's going to be obviously more like a ten-year gap between 'Avatar' and 'Avatar 2'.
"But 'Avatar 2' you are going to with not the promise, but the certainty of three more films beyond that, and that's a very different concept with the audience. And a lot of the delay has been around creating that overall vision," said Cameron.
The first installment in the series released on December 18, 2009.
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