Vergil is in Nero's devil Bringer therefore being his dt. If his soul was in the db b4 he got Yamato or after he got Yamato no one knows. why? Cuz effin CAPCOM is too f**king lazy to make a story line that actually doesn't leave us debatin' with each other over things that NOBODY knows, and to top it all off, Capcom probably doesn't even know wut happened to Vergil either!. And they dug themselves into a friggin 20 meter deep ditch they really can't get out of without pissin off the fans of DMC.
i don't mean to rain on ur parades but Capcom probably won't be bringin Vergil back in the next DMC either. Why won't they bring him back? Well, they didn't put Nero into the story for no reason! don't get what i'm sayin? Allow me to explain it better. Nero's db is Vergil. And if they brought Vergil back that would mean no db and no Yamato for Nero meaning all that Nero is left with is a vroomin' sword and a pistol that u don't need to reload (well, u don't need to reload any gun in DMC except in DMC 2, i think. i dunno much about DMC 2). Meaning they would have to take Nero out of the picture therefore pissin of all of Nero's fangirls and boys.
(for those who are too lazy to read all of this i have a faster explanation. Nero - Yamato & db + Vergil resurrecting = Nero being nothing but a weak human and being taken out of the picture = Vergil coming back =All Vergil fans thanking the heavens for having ther prayers answered (both of them) = all the Nero fans commiting suicide and hating Vergil even more then they originally do)
to sum it all up, i'm done. :]