After a short week, we are down to the Final Four contenders in our Best Billionaire Bracket! On the real side, Microsoft founder Bill Gates just barely edged out former New York City mayor Michael Bloomberg while Warren Buffett was defeated by billionaire playboy Richard Branson. On the fictional side, Mr Burns trounced Batman and Seto Kaiba eviscerated front runner Tony Stark. We are now only one week away from deciding the best real and fictional billionaires and two weeks from definitively deciding who is the Ultimate Billionaire. Exciting stuff.