You know, I'm kinda on board with Mundus being a blood brother to Sparda.I also do not want Liliths child to be an abomination that was posted here. I mean, it looks scary and fits the game else-wise but i guess if you talk about it in terms of story .. there is so much potential to that
aspect if it actually turns out to be Nero
Think about it, at the end.. Mundus and Lilith are gone whereas the baby
remains. Everybody wants the baby dead decreeing it to be evil. Dante
shows some humanity, for he knows what it is like for a demon-blood to
grow all alone ( well regardless of the fact that the kids parents were some sick f***s), and also that a baby is at no fault for the crimes done by the parent. He decides that the baby lives. It could really elevate Dante's character depth.
Also let's look at this. Mundus is called the 'Prince of Darkness'. Nero Angelo means 'Dark Angel'. I guess it'd be fitting if Nero becomes Nero Angelo of the DmC universe. Now a lot of fanboys might get hurt over this.
But, it just suits the storyline so much more. I can already see a scene in vatican with the baby where some kind woman (possibly someone related to Kyrie) gives a dramatic speech while naming him how it is an examply of hope and....... yeah you know where i'm getting.
Also , this combined with the fact that Mundus is Sparda's blood brother
ties up all the loose ends. Now, we know how and why Nero shares so many similarities with Dante and Vergil and also why he has their blood.