Sorry, had missed your part in the flood of fanboying washing at my shore. That's old news though. Aside from the tiny tidbits of cameo mentions - which World of Warcraft makes about all sorts of things, from books and comics to movies and music - it was a rumor of "a magazine," whose name is never mentioned, who supposedly saw content about it, yet never made any article on it, not even after the expansion was confirmed. The "confirmation" on BlizzCon came three years after the release of the first Kung Fu Panda movie and one year before the second, so what this "history" is based on are in-game cameos that abound in the game for lots of things, rumors and a guy saying it was real years later, after the movie success.
So, the only thing you can claim is that you "trust" Blizzard. Yet, with Blizzard being the Apple of video games - copying ideas from other and cashing in on brand recognition as a business model - it turns too much into a case of "boy who cried wolf": Blizzard did it so many times that reasonable people won't trust them to be telling the truth on this, as there's no indication they are besides vague rumors and one employee of theirs saying so.
I dismissed your question and "argument," as it already reeked enough of Eau du Fanboy. Trying to raise doubt with "possibilities" is pointless, since the opposite is just as "possible" - as well as Blizzard's CEO daughter's pet iguana walking over his keyboard and resulting in a Google search on pandas that sparked the idea, or are you Blizzard's CEO to say that didn't happen? Yet, Blizzard's catalog of games is out there, setting them as the Apple of video games, as already stated. Replying to something isn't making it a discussion, especially when one makes it explicit that if you disregard the simple truth of Blizzard "creative" business practices, getting into a discussion is a waste of time. Coming here to signal your repeated attempt at baiting me while waiting for a game to load in my PS4 isn't having a discussion or arguing with you, no matter how much you have that false belief. But since you like dictionaries, here's one definition for you:
delusional
[dih-loo-zhuh-nl]
adjective
1. Having false or unrealistic beliefs or opinions
2. Psychiatry. maintaining fixed false beliefs even when confronted with facts, usually as a result of mental illness
PS:
Uhm...