I think the way you used a song is clever. It will be neat to see what Marty(or any other charter)has to say in a song dealing with part two and three. It will be cool to have Clara's view of her relationship with Doc Brown. After all she fell in love with a man from another time, and thought he wanted nothing more to do with her, until she learned what Doc said was true not just a break up line. I am looking foward to whatever else that you come up with.