@Innsmouth
It's a shortcut to get people invested in him.
Nero would have benefitted more from being introduced as the motorcycle at the end of DMC2. Making him Dante's kid who comes to ask his dad's help for something pressing. He finds lucia and bam you have avoided half of Nero's actual problems and given audience more of a reason to care.
Granted his dynamic with Kyrie is gonna need a lot more work.
Granted the main problem with V being Dante and Lady's kid is where the heck was he during the anime/4? Hell the anime would have actually had stakes if Dante's actual kid was involved.
I'm ok with him not being Dante's kid but I rater just play as Vergil tho. V could've been DLC.