Uuuuuugh, I wanna have faith that Capcom won't do something so dumb, but then seeing as this is supposedly going to be the end of the "Sons of Sparda" storyline then it's niggling in the back of my mind that they might try to do it.
It wouldn't be a deal-breaker or anything, but it would be hugely disappointing if that sorta thing did turn out be the case. :'(
Don't see how a character who was set up and alluded to wanting to discard his humanity to obtain power literally discard his humanity to obtain power is such a bad thing.
Granted that has been the theme of all DMC villains since DMC2 so it has gotten repetitive at this point. However since that theme was best utilized with Vergil if Urizen is basically just Vergil if he got his wish of ultimate power it would be a decent way to end Dante's and Vergil's story then throw in a new character (that really came from nowhere) who has no connection to Dante or Nero outside maybe some history with Sparda. It also creates for bigger personal drama where Nero must deal with his father who he never met is trying to end the world and Dante must finally come to the decision having to actually kill his own brother or try to save him this time.
However, I do believe Urizen is his own person and Vergil was the one who resurrected him to obtain power (and its probably why V knows he is resurrecting if he too is connected to Vergil). Funny thought though when I saw the first e3 trailer my first theory or idea that the big bad (before we even learned his name) might be Vergil(it was probably all the blue).
This also makes V's agony, his intent to see this through, and resentment towards Dante makes sense. If he is Vergil's human side literally ejected from Vergil he is probably dying and needs to kill demons to continue living or something but probably doesn't care and probably wants to kill his demon half even if he dies in the end as long as he can stop his evil half from ending the world for he feels its his responsibility. It also makes sense why he is decaying if the last time we saw Vergil he was near death and barely holding on if he somehow discarded his humanity to continue to live and even obtain more power V probably is his decaying body (probably symbolic of Vergil ditching his human side that he feels is holding him back or weighting him down).
It also makes a lot of sense why Vergil would go to such extreme lengths and seek Urizen for more power. His primary goal in life is to obtain power so he can never feel powerless again like when he lost his mother and after the events of DMC3 he is defeated and perhaps even killed by Mundus (the person responsible for his mother's death and his drive for power), made his literal slave for about a decade, and after blowing up is on the verge of death. The very thing Vergil didn't want to happen to him (feeling powerless and being a victim) happened to an extreme degree so his paranoia of being weak only skyrocketed to the point he will even seek more drastic measures to obtain power. Now the question to ask whether if Urizen is mainly in control, is Vergil mainly in control, or is it 50-50?
Besides even if we know Urizen is Vergil and V is also Vergil in some way there are still a lot of mysteries in the story. Like what is the Qliphoth, why is there a vacant seat in the Underworld if Urizen is now alive or why would Urizen want to appoint a new ruler besides himself, who does Goliath refer to when he said he doesn't want "him" to become ruler (if Vergil is Urizen then he wouldn't be competing since he is the one responsible for this event) , is Vergil/Urizen also interested in getting the fruit, or what if Nero or Dante eats the the fruit