There are two relevant news items if you scroll down the superb web resource here

At least that site lists two separate project elements. Masters of the Air and The Mighty Eighth.

If there’s any filming as speculated at Manston it’s VERY low key!!;)

It was curious at a time when Manston looked like it was starting to fight its for its very existence, no sooner had that started when suddenly a potential ‘saving grace’ in the shape of the HBO mini-series became named. Now baring in mind that even the Reel Brief interview states that they have only recently been looking at UK sites, how is it that the people at Manston said it was possibly in line for selection, but that was last year? It may be that they were trying to hang onto anything in argument to help in saving the airfield.
I don’t see that as a problem in their quest as I’d do exactly the same, but the trouble is that people start believing it.
I would also be curious however, as to exactly what at Manston, would lend itself for a period film when there are a number of others that have all the necessary correct building architecture already in place?
For me, Manston doesn’t, but I’m not the one paying the bill and so if they strike some fantastic deal with Manston, then all power to their elbow.