Does he challenge Urizen as revenge for taking his arm? As a way of proving himself to Dante and company? Out of guilt for losing Yamato and enabling a demon invasion? Urizen defeating Dante a month ago suggests he has little chance of winning anyway, so by pressing ahead, is he recklessly overestimating his own power, borderline suicidal, or simply desperate and out of time given the threat Urizen poses? Surprisingly, the game itself almost seems to say yes to all of them, though Nero wanting revenge is portrayed as his initial reason until later on. A third opinion claims that the Doppelganger has a will of its own, separate from Vergil, V, and Urizen. Others believe that V didn't truly disappear and he's the one taking over the Doppelganger just to make it dance. From this interaction, some fans believe that Vergil's Character Development as V helped bring out the wacky side in him just like his twin brother, but by striking down his Doppelganger after it made a funny dance, he's just keeping his stoic persona intact.
The fact that he seems pleasantly surprised that Nero is his son, and the gentle way he says Nero's name at the start of their fight make him seem like he's changed his future goals for the better, but he and Dante leave for the Underworld to destroy the Qliphoth immediately afterwards, making it impossible to know for sure.
Is Vergil a Karma Houdini who regrets nothing and goes unpunished, or did the positive experiences of being V help him to realize just how pointless his lust for power was when Nero beat him soundly? To make it more complicated, V admits and realizes the gravity of his mistakes while pursuing power, but we don't get to hear Vergil himself admit it as well.When V held Sparda to Dante's head in an effort to "wake him up", was he actually going for the killing blow (perhaps in an act of Taking You with Me before turning to dust)? Or was he keeping Dante alive to help defeat Urizen? The latter is often seen as a call-back to DMC3 perhaps his memories as Vergil made him remember that Dante woke up and unlocked his Devil Trigger after he was stabbed with the Rebellion, therefore, stabbing him with the Sparda might unlock a new trump card?.Was his goal the entire time to regain the power he had lost and take revenge on Dante? Was it simply an act of self-preservation to keep himself from crumbling to dust? Perhaps a realization that Vergil's resurrection was a far better outcome than Urizen's machinations being left unchecked? Given V's ultimate fate, we may never get an answer. V seemed genuinely ashamed of his past actions as Vergil, yet when Dante defeated Urizen, he didn't hesitate to re-merge with it to become whole again.Just how much of V's characterization got retained by Vergil became a matter of debate. By a similar token, Vergil is sometimes hit with the same interpretations because V is his human half, especially after he returned following the fusion of V and Urizen. His taunts, in particular, have him playing an air violin, conducting an imaginary orchestra, tap dancing, and performing Singing In The Rain. His gameplay shows that the air of mystery he presents himself with hides a much sillier side to him.