It is a famous martial arts stance and it looks cool. You might have a argument here, but you can also say coincidence.1. Pandaren reveal trailer
Here is a comparison of the Pandaren reveal and an international poster for Kung Fu Panda 2:
The only major difference in stance is that the left leg is back instead of forward. The sun is in the same location. The temple is on the right instead of directly behind, but uses the exact same coloring (which is far from the most common, especially for temples). The environment is likewise similar. Obviously it's not identical, that would mean lawsuits. But it's undeniably similar.
A company like Blizzard does not *accidentally* make a major product preview so similar to another major product preview of a similar theme. They have entire departments devoted to ensuring that does not happen. Unless you believe that Blizzard is utterly incompetent, you realize that - at the very least - they were aware (beforehand) how similar their reveal would be to KFP and decided to keep it that way.
Ok first off, PANDAS LOVE TO EAT. They can eat 40lbs of bamboo a day http://www.wwf.com.cn/english/pandac...a_q_a/diet.htm convert 19kgs and you get around 40lbs. That isn't something Kung Fu Panda just came up with and also, Pandas tend to look fat so think about it for a moment.2. Racial traits remove any doubt
Gourmand/Epicurean: Po loved food and ate in excess (which is the exact definition of Gourmand). He was also a cook. There's really no argument here. Blizzard did not pull those traits out of thin air and just happen to have them match KFP exactly while having nothing to do with the WC3 Brewmaster.
Inner Peace: Inner Peace plays a large, mentioned-by-name role in KFP, with Po told that if he finds it, it will lead to a drastic improvement in the speed of his training. Herp derp, rested exp. Again, exact reference to KFP, yet has absolutely nothing to do with the WC3 Pandaren Brewmaster. Unless you consider a drunken haze to be Inner Peace.
Bouncy: Some may have initially thought that this was some sort of reference to cuddly bears or something, but think back to how much bouncing around Po did and the actual source of the name becomes clear. This also has nothing to do with the hardy, drunken-brawling, never-falling WC3 Brewmaster.
Inner Piece, isn't just something that Kung Fu Panda CREATED. This is apart of the culture, especially with monks. This whole deal with innter piece has always been around.
Bouncy, yea ok, they took this from Kung Fu Panda or the Gummy Bears lol (the cartoon, not the snack). Lets be honest with ourselves, there is NO WAY they wouldn't borrow something from Kung Fu Panda, Blizzard always gets something from popular culture. This will get ZERO argument with me cause it is so obvious.
The biggest problem you have is that you have two places drawing from the same source USING the same thing. Of course things will be similar They can't take a Panda and make it a knight. First off, that is insulting to the Chinese which already had a problem when Blizzard had artwork and I guess a pandaren unit in WC3 that wore Japanese armor. The Pandaren monk is inspired by Chinese martial arts which Kung Fu is and it is a fact that pandas like to eat. Mix these all in and you can have 2 similar things kinda how Warhammer and WoW are similar, but not the same. I am expecting a few quests to references to Kung Fu Panda, but also reference other famous martial arts movies in general cause that is how Blizzard is. Basically a lot of what you pointed out, the source doesn't come from Kung Fu Panda.