No, this hasn't been released yet, but the contents are now well-known. And no, I don't get it, as the previous reviewer noted.
With DVD sales being what they are and the same companies trying to sell you the same thing all over again (hello, Blu Ray), this is a strange box set and most likely not worth it to you.
The 'newest' thing here is the Hellraiser Blu Ray, which will also be made available on its own. Otherwise...you get the cool box. And we've been waiting for a Hellraiser box set that looked like the Lament Configuration, but this isn't it. It's only the first two films, and it's the 20th anniversary edition of each...both of which have already been available.
Basically, if you haven't purchased the first two films in 10 years, since the tin box from earlier this decade had very nice versions of both with pretty much all of the extras you'd need, then this might be a good pickup. (The Hellbound: Hellraiser 2 20th Anniversary disc does have a number of new extras not previously seen, while the original only adds a few non-essential interviews). Otherwise, as has been noted, pick up the Hellraiser Blu Ray if that's what you need, and wait for a ultimage mega-box of all of the films, if they can ever sort out the rights, the format, the versions, and the extras.