I think that they still have a lot of stuff in the vault. You have the whole Sex Sells album that wasn't released, we know that there are a lot more NJ demos but they probably never made it that far and they don't have the recordings anymore, we also have the SWW outtakes, KTF also had a few tracks we never heard like Skin Deep and All Wound Up + Diamond Ring which I guess is a different take than on TD and NJ. And there are also some outtakes from The Circle and from WAN.

Plus you never know how many outtakes there are that were never mentioned anywhere, I mean who the hell knew about Blind Love and SNGMSM?

Anyway I consider that Jon doesn't really give a crap about die hard fans, the guy has so much money that he could easily pay Obbie or someone else to collect these demoes and remaster them and make another AXP program or something similar.