Will Yun Lee hasn't exactly been forthcoming with details on his character Colonel Moon. As John007 points out, in a recent interview Will has had little to say about Moon bar a small, intriguing comment.
When asked about his role Will responded, "Basically he's one of the villains in the Bond movie. And he, I would say in the Bond franchise history he's definitly an interesting twist on the villain himself. That's pretty much all i can say".