Scarlet Gospels Would be an Incredible Movie
Having recently finished reading The Scarlet Gospels and re-watching every Hellraiser movie shortly afterwards, I honestly believe that it would make an incredible movie, if done correctly. However, with the genre I highly doubt that a proper budget could be raised to do it justice.
Revelations was by far the worst of the franchise, but other than that one, just about all of them contribute to the mythos at least to some degree, as well as how Pinhead can toy with people. However, that being said, they did move somewhat away from the original idea (especially in 7) that they explore the senses to the extreme, into demonic cops, as has been put out in other threads on this forum.
As far as The Scarlet Gospels goes, the story of Pinhead attempting to steal Hell from Lucifer and the events that surround it are truly epic. I saw the "trailer" for Hellraiser: Origins and it definitely produced a much more grand scale than any of the previous Hellraiser movies did, and it looks like it could have even been made in conjunction with The Scarlet Gospels, even though I know it wasn't. Regardless, the grand scale of The Scarlet Gospels will not be able to be portrayed correctly mostly due to budgetary constraints.
If Judgement could be done correctly, even given its extremely generic plot, it could still end up being a good movie. I enjoyed 2, 5, and 6 the most out of the sequels, and in that order as well, and just because Revelations was done so poorly doesn't mean that Judgement will be done poorly as well. I have hopes that they will have at least learned from the previous failure and will make something of it.
All in all, The Scarlet Gospels is most certainly the sequel that Hellraiser deserves, and those of you that haven't read it definitely should. It expands so much on the power of Pinhead and what drives him as a being. However, that being said, I'd imagine that I would be disappointed in it solely because the scale could not be done properly with the money that horror movies can raise. Clive Barker is still the horror icon that he was, and has only gotten better over the years.