This is especially prevalent for Asian cinema, take this infamous Infernal Affairs cover for instance.
Another infamous example is the Dragon Dynasty cover for Johnnie To's P.T.U, with it's helicopter and exploding building that don't appear in the actual film.
Not that it's required, but here is a third example, the UK cover for Painted Skin. What a turd!
So in the interests of balance, it's only fair when an art department does get it right, we need to celebrate them. Therefore it's congratulations to France's Neo Publishing for their dvd release of Umberto Lenzi's amazing Roma A Mano Armata or Rome Armed To The Teeth as it's known in English.
The dvd comes in the slipcase pictured above, which when removed unveils this glorious cover. The dvd itself is excellent too, sadly not English friendly, but I wasn't going to let that put me off. As far as I know the only currently available version that is English friendly is the German limited edition hardbox release under the title Die Viper.