Take it with a grain of salt, but interesting. Apparently we'll get our full explanation in Vergil's story cut scenes this summer.
http://i.imgur.com/gJ0anGe.png
I think I like this idea much better than Vergil being Nero's father, and it makes sense. There's a huge precedent for cloning in the series - Trish and Lucia - and I always did wonder why Nero was the odd man out when it came to having an unnatural Devil Trigger. I mean Dante and Vergil don't have a Doppleganger of Sparda as their DTs, it's weird that Nero would have a Doppleganger DT at all to begin with - much less of Vergil.
![gJ0anGe.png](/proxy.php?image=http%3A%2F%2Fi.imgur.com%2FgJ0anGe.png&hash=1048dbddd26b9d9a5127d8ec59182c05)
http://i.imgur.com/gJ0anGe.png
I think I like this idea much better than Vergil being Nero's father, and it makes sense. There's a huge precedent for cloning in the series - Trish and Lucia - and I always did wonder why Nero was the odd man out when it came to having an unnatural Devil Trigger. I mean Dante and Vergil don't have a Doppleganger of Sparda as their DTs, it's weird that Nero would have a Doppleganger DT at all to begin with - much less of Vergil.