I'd never heard of the guy until all the Avatarland threads started here. Then it was explained that he also did Titanic in 1997, and I said "Oh."
Go down to your local Target or Toys R Us big box store. Try and find anything Avatar related. Avatar merchandise doesn't exist because there's no demand for that product. Star Wars exists in big box stores, so does Potter and Cars and Princesses and Marvel and Frozen. But not Avatar.
And there's also my semi-famous annual Halloween tally. In my Villa Park, California neighborhood full of trick or treaters (I go through at least three big bowls of candy every year), I have never seen anyone dressed up as anyone from Pandora. Ever.
That's the part that worries me about WDW putting all this money and focus on Avatarland. There's no market for that product at the nations big box stores, and free consumers choosing to be their favorite character on Halloween never choose someone from Pandora. Quite simply, Avatar is not a thing.
And yet WDW is planning for Avatarland to be this huge driver of attendance and attention. Did no one on the planning team go down to Target to see what the demand was like? Does Bob Iger not answer his own door on Halloween? It's not rocket science; Avatar is not a thing.