Lol, when a company refers to their own game, months/years ahead of release, I know that they are taking the "it cost a lot to make" definition of AAA, as opposed to the "it's a good game" definition.
I can safely say that this game will be like all those others, overhyped by the developers, they will release stills from the pre rendered cutscenes, everyone will think it's amazing, then it will come out and be mediocre.
tl;dr version - the developer does not get to say whether a game is AAA or not.