A few things to note in this scenario:
I originally thought it might be Sony's own mislabeling mistake, however the fact it shows up inside the trailer itself, likely means that this is what was given to PlayStation by Ubisoft, rather than just a mislabeling on PlayStation side.
In their Press Release Ubisoft themselves have outright stated the game will be available exclusively on Next Generation consoles, PC and cloud services.
With these 2 notes together, what most likely happened was Avatar was developed as a cross generation game, and recently they decided to cancel the PS4 and Xbox One versions, these PlayStation channels had likely received the trailers ahead of time before the last gen versions have been cancelled.
While this doesnt necessarily add anything new here, I do think that this is an interesting added perspective on the game's development.