AVATAR 2 will definitely happen- no doubt. James Cameron has confirmed there will be a whole AVATAR trilogy. He also announced that it will come out in the next decade. No one knows when because of how long it took to make the first one. He has a few ideas for plots and has very few cast members so far: Sam Worthington, Zoe Saldana, Joel David Moore, Stephen Lang, and Sigourney Weaver. However, the first AVATAR will be re-released in the summer of 2010.