Remember in the first movie Marty asks 'What is it, is it hot?' after the Dolorean returns? Well I thought you could have a song in the style of 'drop it like it's hot'. It could something like: When you endanger your own existence What is it, is it hot? What is it, is it hot? What old Biff wants to get rich! What is it, is it hot? What is it, is it hot? When you want to stop Docs death What is it, is it hot? What is it, is it hot? Marty and Doc could be rapping, Marty in his 80s gear and Doc in a radiation suit. In the meantime Jennifer should be twerking in the background.