They promoted Barao as best in the world, he won 30 fights in a row and the other option is Assuncao.
Guy deserves a rematch for winning that many fights and the next alternative is a fight nobody cares about.
Not that Barao/TJ is some huge fight but as a PPV main event its alot bigger than selling TJ/Assuncao.
UFC, Pride, WEC Greatest Orgs of All Time
Survived Tachi Palace 10 "Let The Stream Fail"