Bryant Moore -- a science fiction writer not-famous for his screenplays "Aquatica" and "Descendants: The Pollination" -- claims Cameron used the two screenplays as the basis for "Avatar."

In his lawsuit, Moore points out various similarities, including bioluminescent flora/plant life, unbreathable atmospheres, matriarch support of hero vs. heroine, spiritual connections to environment and reincarnation, appearance of mist in scene, sunlight to moonlight, crackling from gargantuan foliage, blue skin/green skin and battle scene on limbs/branches.

Moore is also going after 20th Century Fox and Cameron's production company. He wants more than $1.5 billion in actual damages and more than $1 bil in punitives.