HeDanny: Hyperdimention Neptunia is currently on sale on Steam. Fingers crossed it is a pre-empt to becoming available here on GOG, and finally putting this Enigmatic hint to rest.
Putting aside whether or not such a release is likely, assuming it actually does happen, I think we can expect it to be the most polarizing release to date. I remember the backlash Long Live the Queen received and that game (at least to my knowledge) doesn't even contain anything really objectionable. I mean, sure, Neptunia is by no means outright porn, but it still features underage-looking girls in skimpy outfits. Considering this, such a release would all but ensure an explosive backlash.
That said, one could have said the same about Agarest and the reaction to that was...practically indifferent. Most of the release thread was spent talking about the gameplay and the grinding DLC that wasn't released on GOG and almost no one brought up the by no means modestly-dressed girls. Then again, in Neptunia, the skimpy outfits are much more at the forefront.