Friday's Smackdown main event plus a new PPV match for Sunday

Christian vs. Sheamus on Sunday.
Christian vs. Randy Orton is the Smackdown main event for Friday. 

What do you consider the main event for Sunday's WWE PPV?


Who is the biggest star of these people right now?


Who will be the next UFC champion to lose their title?


Will McGregor vs. Aldo top 800,000 buys?