Thanks for your perspective, guys.
Rudra, really? If yes, then

If you manage to incorporate Sergio Leone trademarks and Ennio Morricone music, tht would be great. As a lawyer, though I would advise you to do your own due diligence on whether copyright subsists on the latter.(Ennio Morricone music) Inserting Sergio Leone trademarks will not present any problems though.
Groggy, indeed, it would be worth checking that too.