Heard it a few times, but is Avatar really not a big draw? The film made nearly 3bn in the box office which suggests there are plenty of people that like it out there. Do wonder though if the Pandora land has increased Animal Kingdoms popularity this year.
Regardless, a high quality land like Pandora with a couple of amazing attractions being in Disney Paris would be a huge draw and would help the Park regain the visitor numbers that have been dropping for the last couple of years. ( based on https://www.statista.com/statistics/639475/disneyland-paris-theme-park-visitor-numbers/
I would prefer something like the Beauty and the Beast area or something new just for Paris based on one of the many Disney stories that haven't been made anywhere else ( maybe a Robin Hood take on toy story mania, Wall E dark ride or a Big Hero 6 version of Soarin ).