What about Sparda? Who's gonna play him? It's likely that whoever's making this movie IS going to involve him, one way or another. Maybe as a figment of Dante's imagination, perhaps? Or some sort of hologram..thing?
Anywho, since we didn't completely see what Sparda really looked like, we can only suggest an actor that fits his posture. I, for example, think Jeremy Irons would be just suitable to portray a present day Sparda. Ralph Fiennes would work just perfectly too, but he's too damn picky. Since 2008, Liam Neeson seems to be less afraid to take roles in second-hand movies, so I guess he'd be in too.