As I understand it, Melodyne DNA will enable you to change ANY note in a wav file. I saw a Youtube video where they had recording of Chet Baker, they went in and changed all the notes of his solo, without changing anything in the Rhythm section! AMAZING. The uses of this are mind boggling.
That being said, what I think you are asking for is the ability to make your OWN Real Tracks, something that isn't yet possible. Real Drums however can be made. Let's hope Peter decides to make this feature for RTs, it would be a great resource and possible 3rd party opportunity.