>>58144446Wood is replaced with Void, and Metal with Wind. There might not be an implication here other than the fact that Huanglong doesn't exist in Japanese mythology, hence the Void.
The Void also holds double meaning, in Taoism to achieve void it's to be absent of both yin and yang. The nothingness, which is Kyurem.
Assuming the whole of Yin Yang, which is a paradox as it cannot possibly happen, were to be as one, it would result in Huanglong. But there's more.