Defending Olympic gold medalist and world record holder Missy Franklin faces off against Aussie duet Emily Seebohm and Belinda Hocking .
Aussie duet Emily Seebohm is the 2015 world champion .
Defending Olympic gold medalist and world record holder Missy Franklin faces off against Aussie duet Emily Seebohm , the 2015 world champion , and Belinda Hocking .