Dante will show up in the trailer via 3D simulation. Indeed, most of the animation and effect will be accomplished in 3DS Max. In terms of real world clips, I think most of the scenes will be taken in green screen rather than be taken in the public because I don't have free time and effort to set up all the scene I need to clear out people for taking video.
After checking the policies from Capcom, it appears that using the game model in non-commercial fan product is explicitly legal without permission. Consequently, models from DMC 4 will be heavily used in the movie trailer.
Though I want to make a full length short movie, i.e. around half an hour, my time and money is limited. In addition, the time will also be limited to less than two minutes so that the developing time will considerably shorten to 200 hours (in most case I will finish all the stuff by myself).
Here is one screenshot of a blood cell I made this now for the transition from a human to half-devil.