Angels as an enemy faction.
It would make sense too. The order might have lost a leader, but others will step up to take their place.
Friendly demons fighting with the player. That would make things interesting. Big open war battlefields.
Except it would then get more complicated. Angels are basically using demons already. So it could further devide into different factions with angels and demons on different sides fighting each other.
I want to see more "big ideal talks" too. Dante's a **** listener. When is he going to learn to stop deciding better for others when he can't ask?
This game is proof of what I'm talking about. People don't even ask. Virgil has a better idea. He'd even ask Arkham.
Sparda has to be met at some point too. Just because he "Fell off the radar" and people "say" he's dead doesn't mean it's true. Even if it is this is magic and ****. What's stopping him coming back from hell? At some point he's going to be in Devil May Cry. 3 hints at it. His own image.
So the question is this. When the player finally meets Sparda (come on Devs. Make it DMC6), what is he going to be like? From the images we have, and the history we know, it's clear he's the confident/bold type. I can see Sparda being jaded and on edge at first. Due to constant fighting. Being seperated from his sons.
Would like to play as Sparda too. Fighting against the sons at first. Maybe Nero. Before joining up with them in a much bigger war. Imagine friendly demons fighting other demons and angels. Bigger numbers. ALL the characters can be fighting in the same battle. Dante, Virgil, Nero and Sparda. Perhaps being able to swap between them mid mission.
I can see that working. Just don't aim for the best graphics. Keep it focused on gameplay over graphics. And that can work.