Hello and welcome from Sacramento, California
Dr Pepper?!? ...well, some aged Virginia blends have a plummy, raisony tin note, but, that's not really translated to the room note or the flavor very well. I bet you could get ahold of some Dr Pepper syrup somehow (used for soda fountains), and spritz a light mist of that over an aged straight Virginia, then age that in a jar for a couple months. Make your own Dr Pepper blend!