And we leave Dante and Vergil basically how we originally found them. Fighting. As Lady originally described "It seems as if they drive some twisted pleasure from this brotherly fighting." For them, fighting is their love language. And they have a lot of catching up to do. After Nero knocked some sense into them, any feelings of true animosity and desire to kill one another is pretty much completely gone. All of a sudden they're back to being kids banging wooden swords together. Hard to blame them for taking so long just indulging in a bit of good old fashioned brotherly love for weeks at a time instead of rushing to go back home.
DMC5 added Vergil as a playable character and extended the ending of the game with some extra scenes with him and Dante in the Underworld which I included into this. First we have another scene showing that Vergil is completely emotionally stunted and incapable of confronting the fact that he has a son and all the crazy mixed up emotions that brings in its wake. Which is cute. Gotta grade the guy on a curve, I'm sure he'll grow into those daddy shoes eventually.
I honestly really like the way the game leaves them off. Reminiscing about their childhoods so casually like that. It was such a painful thing for the both of them, remembering the past. Remember how in DMC3 when they first fought, Vergil only cared about their parentage in the context of using the blood of Sparda to get more power while Dante denied he even had a father. Now they can call back to childhood memories of their parents scolding them like it's nothing. They've definitely grown quite a lot and gotten over a lot of the pain and anguish they used to carry.
I find the dialog they end the scene with to be very poignant and sweet. Dante muses about what their parents would think of them now, as crusty adults. But Vergil just says in a seemingly callous way that it doesn't matter. What does matter is that they're alive, and they're together as brothers for the first time in as long as either of them can remember. And Dante agrees.
It's very sweet. These two deserve their happy ending. The culmination of a relationship that chronologically started with a duel to the death in the rain ontop of the tower to the underworld. All of that baggage and drama and hatred and anguish has been swept away. They're together again. And always will be from now on.