where do you get this disappeared stuff? Kobayahshi in an interview? He lies about alot of stuff on purpose to throw off the gamers and keep then guessing( Always believe the actual game before any interview). The game already states that he was killed and DEAD as in no longer living,deceased.
His body was destroyed by Mundus and soul was place into Nelo Angelo. Even if he is still alive(WHICH HE IS DEAD, SAID SO IN DMC4.) There is no way he will ever be the same. For the simple fact his body is gone and destroyed. The only chance he has in coming back is through Nero if they are truly connected. Other then that, he won't be making that famous Zero return to save the day.
I know we all love Vergil but let him stay dead, I would hate for them to ruin his character if he returns. See if Nero and Dante are around(Kobayashi has already admitted to loving Dante and Nero and despised Vergil for his fanbase, but at the sametime applaud him.)He already said that they wanted to focus on building up Nero's and Dante's relationship in the next titles.For Vergil's character sake it is a good idea for him to stay dead because there is no real way in having him return without some stupid story behind it unless its through Nero.
Now ill be glad if they gave us a playable Vergil in the game as an unlockable but that's as far as it goes. He should get his own mini anime on how he took on Mundus and the path he took to reach him. But they already hinted to his character in full flesh is not returning. That is one of the reasons why people tried to boycott Capcom like 1 year ago and for it being on the Xbox.(lol?).