Am I the 1st Broan to do this?

i didnt make that up, i should have taken a SS of that too, but other will have their black belts soon enough, you will see im not joking im serious, when u get ur black belt he says something to the effect of,

"now that you have black dont get too proud my master reserves a most special belt for only the best of his pupils, the green belt"

and thats all thats said, i clicked every option after that and nothing, i can only assume the green belt has not been released yet

Or it's nothing more than fluff text. Not everything NPCs talk about gets released. Currently, there is absolutely no Green Belt, and nothing to look into.