Did you know
That given the circumstances of his defeat, Diavolo is neither dead nor alive. He is in an endless cycle of deadly situations. Along with Kars and Magent Magent, he suffers a "fate worse than death", condemned to never die.
Additionally, Diavolo's defeat, while intentional or not, is religiously symbolic to the foretold defeat of Satan in Christianity. Giorno, the son of "God" (Dio), defeats the "Devil" (Diavolo) and condemns him to suffer endlessly for all eternity.
Fun fact: In the western release of All-Star Battle, King Crimson is renamed as "Emperor Crimson", while Epitaph is renamed to "Eulogy". The first one is likely intended to be a pun due to Diavolo's statements that he "will be emperor", while an epitaph is an encarving on a gravestone and a eulogy is a speech delivered at a funeral.
(Picture unintentional. I didn't have anything else of Diavolo)