I guess Peaceville really doesn’t know when to quit with the compilations and reissues (or that at least they’re a viable way to make more money off known famous works), since they’re also rereleasing Mayhem’s Live in Leipzig. This is specifically the 25th anniversary of the concert documented, as opposed to when it was first ‘officially’ pressed and sold to a mass audience some years afterwards. The CD version of this rerelease also contains a contemporary recording of the band in Zeitz, Germany. See Peaceville’s site for more details.
Whether Live in Leipzig is at all worth your time depends, perhaps, on how you value the various ‘eras’ of Mayhem. It is likely the easiest way to experience the band’s ‘classic’ lineup, featuring both tracks that would eventually make it onto De Mysteriis Dom Sathanas as well as somewhat revamped older tracks from the band’s early, proto-death metal days. As a listener, I find the most value in the polished studio work of Mayhem’s formal debut (because I value Atilla Csihar’s contributions), but the looser intrepretations here are worth at least a few spins.