Well we don't know about destroyed. There is still that theory that since we didn't see him die completely like all other DMC foes, that he may somehow survived and the light was teleport or something. A pretty known theory for Vergil fans.
Although it is kinda stupid, to think that Vergil's death was the most retarded in the whole game. Each other guy, got the spotlight. Nelo Angelo flew, gave off light and then we saw everything except him - even Trish speaking with Mundus.
Well not that he could converse with Dante about anything since he could only laugh like the classic villain but then again..even Griffon died in a better way..