In case the lecturing, hyperbolic Avatar wasn’t left-wing enough, get ready for four sequels from director James Cameron. According to star Sigourney Weaver, the new films will continue to expose the “greed” and “callousness” of evil corporations. If you’ve forgotten, the 2009 film featured capitalistic humans raping the planet of “Pandora” in order to take the natural resources from giant blue creatures. Talking to Entertainment Weekly on Friday about the planned sequels, she said: “These films are very much about the peril of this beautiful planet, and [Cameron] is continuing the same themes of greed and callousness of the corporations...