Ohhh, Anneke Wills has tweeted she's attending a "Secret" screening in London tomorrow. Assuming it's not a completely unrelated event (about the only thing it could be is a press screening for the Hartnell docu-drama surely?) that seems to be firm confirmation some Ben and Polly is back in the archive as well. With the Monbase DVD delayed I'd say the odds are pretty good on that (or maybe whatever odd episodes from other stories that have been found will be packaged with it?).
Shame Peter Purves doesn't know anything about any recoveries, looks like Stephen has lucked out.