I'm excited about this, but the truth is that I think I've already got all of this material. I'm picking up the "Super Deluxe Edition" from Rhino. The extra 50 bucks to order the shirt and poster from the STP store isn't worth it, even with the Plush record single, which isn't a new cut anyway.
The only really 'new' material is the post-MJY, pre-Core demos of Dead & Bloated, STT, Creep, Sin, and Plush. Otherwise it's just going to be higher quality versions of boots we have had for years.
But to be honest, I just don't think there is that much unreleased material from that era. Just about any show with a quality soundboard recording made it onto a bootleg and they didn't have many songs that didn't make it to the album. So in the end I care more that they are making the effort than whether or not they are releasing anything 'new'.
I'm thinking of just getting the Super Deluxe Edition (non-bundled) from the STP store. I already have Music On Vinyl's Core reissue from a few years ago, so I'm more interested in the Plush single than another vinyl copy of Core... (So sue me, I've never been a 'collector'.) But on the other hand Amazon's pre-order price is pretty tempting.