Rain's / Bi's number one rookie apprentice, Lee Joon is going to appear in Rain's upcoming movie Ninja Assassin as Rain's younger self. J-Tune Entertainment officially stated that "Rain and Lee Joon would be appearing and that "Lee Joon is like a hidden card." Although I don't have high expectations for Ninja Assassin, I hope for this guy's sake that the movie does somewhat well. Otherwise he'll be like one of those hidden cards you find under your couch on moving day. Dusty and forgotten until someone realizes 10 years later that he was there the whole time.