Beating eight gold medals

Here is how Michael Phelps can one up himself. First, he can fake his death in a mysterious skydiving accident. Then, after the coverage has died down, he can be secluded for several months in Thailand. In 2010, out of the woodwork emerges Michelle Phelps, Michael's long lost sister, promising to avenge Michael's death at the hands of nature by defying nature itself: she will win 9 medals in the 2012 Olympics, in two sports. After she completes this amazing feat, becoming the greatest olympian of all time, it will be revealed that she was in fact Michael Phelps all along.