Disclosure will never happen officially. It will be via a mechanism similar to Wikileaks.
Some do think that the American contingent of the globalists is very resistent to disclosure for any reason ever.
On the other hand, I figure it has to come in some form . . . likely incrementally as it has been for a long time . . .
in order for the critters to be seen as
1. saving us from ourselves
2. forcing us into a world government to fight the evil critters from space . . . in league, of course, with other critters from space on our side—just as evil but pretending to be otherwise . . .
3. helping the AC to engineer and maintain the most tyrannical and totally global government the world has ever seen or will ever see again—the tyrannical part.