Remember that other blog I wrote a while ago?
As it seems, it wasn't Elvis's hand in Al's original boxart. It was our classic USA poster man Uncle Sam.
So, the theory I mentioned of the pattern they used (Old singer+ frankenstein element+ flaming background) is wrong as in Al there is no singer element aside from the mic.
Nonetheless, it feels nice knowing where the pictures of the boxarts are based on. PFX sure knows how to pay homage.