Well they´ve said in the past that they were planning on releasing digitally remastered versions of their first four albums, On Through The Night to Hysteria, with adittional material so we could see other reissues in the near future. Considering the tracks from X and Euphoria that were including on the Best Of and Rock Of Ages compilations were all remastered and they were only 3 - 6 years old by then, so it´s quite likely. Even Bon Jovi´s These Days album was only remastered 3 years after it´s original release.