LOS ANGELES, Jan. 21 (UPI) -- At 70, Jackie Chan continues to experiment with new modes of cinema while delivering his trademark action. A Legend , on DVD, Blu-ray and digital video-on-demand Jan. 21, isn't always successful, but is an atypical film for Chan that ultimately pays off. A Legend opens in the Han and Hun era, but jumps to present day, with Chan's Professor Fang leading an archeological dig for Han Dynasty artifacts. Those artifacts lead him to dream of Han soldiers Zhao Zhan (also