It's very likely that Dante will become playable in perhaps the last half of the game............or an unlockable. Oh, and Nero isn't Nelos Angelos.....(that's Virgil,Dante's older bro). I think what Nero's hand does is pretty cool. It will be able to grab creatures and swing them into things.....It's Demon-possessed.
I think Nero is a clone of Dante.....they look too much alike no matter how hard you squint.
Definetely a reason why I'd even consider shelling out 600 for a PS3.