Not likely before the first of the year but it is anyone's guess when they will or won't offer them. I assume they have a set number in mind that they want, when enough people don't renew and they are a set % below this set number they offer them again. This is also why some MK are available when others aren't.
For example:
They want 500,000 Inspire Keys. When they are 95% of this (or are under 475,000) they then offer them again until they hit 500,000.
Of course this is just my guess and not really based on anything official,