So, DMC got a important element of the saga dead at the very first game; for getting Vergil again in game they needed to make a prequel; now they invented Nero to replace Dante because Dante is now too old and they forced Nero down our throats making him Vergil's child, in a way they are unwilling to explain, but Nero lacks twin's charisma.
Definitively DMC story is garbage at this moment, it's a total mess!
Ok, mates, so this meaning to have Vergil we have two options: or they go with a DmC sequel ( where Vergil didn't die or he was resurrected or they make a total rewrite of the story.
No more prequels, since it keeps the story from progressing.