Is anyone surprised? It's the same fucking "what if [x] had feelings" shit that Pixar has done far too many times, only somehow looking even more generic and bland than usual. If Pixar isn't shitting out a low-effort sequel to one of their good movies (do we really need a fifth Toy Story movie?), they're going back to that dead horse.
Anecdotal, but every time I saw the trailer in the theater, I could hear audible groans from others about how awful it looked, when they generally didn't react that strongly to any other trailer, positive or negative. You could guess all the story beats from the trailer (segregated society, wacky introduction of water guy and fire girl, forbidden but quirky haha romance, everyone learns to get along in the end), so it's not like you actually needed to see the movie itself. And when it looks that boring, who would even want to?
It's not that people won't go to see original ideas, they just want something that actually looks interesting. Pixar's lost any of the creative drive they had at their outset, and now all they can produce is generic corporate pablum. Hope you enjoy another box office bomb, Disney. Can't wait for Indy 5!