The more posts I read in this thread the more I'm convinced that we will get something of interest this weekend. I apologise for my initial negativity
I support Valatonin's R35TT theory. The majority of the tracks seem to be shorter cuts of the longer originals, as can be heard when they fade in/out.
New material seems more likely than old material at this point. They've not released a full track in years so I assume they've been working on something and not just dusting off the old tapes.