Watching the trailer again, this Vergil seems to have a little spark of bright-eyed fanaticism. He's pushing on Dante hard to be totally loyal to him, probably the same way he got himself a whole Order of followers, and it reeks of manipulation. Considering he suffered at the hands of demons as much as Dante did, he probably really does want his brother on his side against them for sentimental reasons, but since he's a shrewd businessman, he's also not above using Dante for practical reasons, either. I predict quite the confrontation by the end. The one thing the Vergil vs. Dante conflict lacked in other DMC media was low-key interaction - they expressed everything through one-liners and beating the snot out of each other. Which was great, but limited. I've always wanted to see how they'd relate as brothers, before the enmity set in. Looking forward to more of that.
Really bummed that Dante doesn't remember having a brother at all, though, along with his mother. I liked that Dante and Vergil had this whole history together before. Now there's only this game to build the context of their relationship. It could very easily end up too shallow.