I read this thread title and thought
"There's already a Pandora shop in New Orleans Square!"
Then I opened the thread and saw what we're talking about and said...
"Oh, that Pandora. Nevermind."
But that just makes my point. Avatar is not an impactful franchise. The E Ticket is well received in WDW because it's a big, splashy E Ticket in an amusement park that only has 8 rides. Eight.
Seriously, the amusement park Avatar is in has only 8 rides. And KiteTails.
Also, since Avatar was released over a decade ago I have never once had a child show up on my front porch at Halloween dressed as a blue alien. And for the 25+ years I lived in Villa Park, I gave out full-size Hershey bars and Reese's Peanut Butter Cups on Halloween, with custom made See's Candy gift baskets for Best Girl, Best Boy, and Best Family costume winners. No one has ever worn an Avatar costume on Halloween.
Avatar is just not a thing. Eight rides!