This is a tribute to The Second Mortal Kombat film. Liu Kang looked pretty bad in that one. While he is good at martial arts Rock Lee is better. Rock Lee is faster and is a ninja so he can climb trees and sort of teleport. He also has 2 super forms. Rock Lee wins.
DReager1.com 
hahaha! rock lee wins again
Definitely! Taking down Rock Lee is extremely tough!
yo creo que ganaria liu kang si pudo ganarle a shao kahn y a superman como no a rock lee
Agreed