As mentioned above, I wouldn't be so quick to dismiss the suit. This isn't the first time that Cameron has faced a lawsuit like this and he definitely gets a lot of help when creating a screenplay. Other than 'The Abyss', Cameron's films have either been remakes or sequels to something...
I saw this article entitled 'WDW's Most Endangered Attractions' on the BBC Travel website today. Granted it reads like pure speculation, but there is a hint of a date on one of the attractions. Anyone else hear of anything along these lines...