FOIA requests take forever to adjudicate. If he's looking for that material for his book, the publication date is somewhere around 2018.
If, on the other hand, he doesn't want to bother with the FOIA material and merely engage in fact-free fear-mongering, then this is perfectly timed.
He either gets something useful or not. If he does then he can strut. If he doesn't then he can hold up the empty form as proof that there's some high level cover-up going on.
win-win.