Avatar Getting a Sequel?

[Magus]

Won't the sequel have to cost like 500 million dollars and be four hours long or something? I hate when they start talking about a sequel a month after the movie comes out, you know they're just saying that because it made a billion dollars. They don't have anything planned, probably not even a basic story at this point. They just KNOW there will be a sequel eventually because they want more money, actually thinking up a plot comes second. The same thing happened after I saw District 9, the next day there was some pointless news blurb about how there is going to be a sequel, but nothing about its plot or characters or anything has been planned yet. Pointless to even talk about it.