The trouble with this is... RMiller already covered a lot of stuff in that interview he did with him. Such as the possibility of a new RDV project. Though some time has passed since that interview, so plans may have changed.
I'd probably throw in some questions regarding his past. When was he born. Where was he born. Where did he grow up. When did he first start rapping. What got him into rapping. Information regarding early works that many may not know about. When did he start Roguish Records, what's that label's current status, etc. Get some background regarding him, and then go from there. Dig for some information regarding the album, it's features, it's producers, it's overall sound, etc. Plans for the future, etc.