I watched the VH1 special "Ultimate albums" on pyromania a little while ago. In the interviews they talk about how music in 1983 was stale and people were looking for something new. Def Leppard took a chance with Pyromania and it paid off big time. When it came time to record their next album, they took their music in another direction with Hysteria. In the making of Hysteria special, they talk about how everyone was still remaking pyromania, and when Hysteria came out it was a shot in the arm. Taking a chance once again paid off for Leppard. That's the problem with Adrenalize. They remade their previous album and didn't try anything new. Music in 93 was changing and Def Leppard put out the same album they did in 1987. Maybe if they would have made a heavier album like Retro Active. Re-record some of those songs and making a rockin' album. Who knows. Adrenalize is just a cheesier, less good version of Hysteria, produced not to change music, but to make some money.