In 2008, Woo returned to Asian cinema with the completion of the two-part epic war film Red Cliff, based on a historical battle from Records of the Three Kingdoms. Produced on a grand scale, it is his first film in China since he emigrated from Hong Kong to the United States in 1993. Part 1 of the film was released throughout Asia in July 2008, to generally favourable reviews and strong attendance. Part 2 was released in China in January 2009.
In May 2008, Woo announced in Cannes that his next movie would be 1949, an epic love story set between the end of World War II and Chinese Civil War to the founding of the People's Republic of China, the shooting of which would take place in China and Taiwan. Its production was due to begin by the end of 2008, with a theatrical release planned in December 2009. However, in early April 2009, the film was cancelled due to script right issues. Reports indicated that Woo might be working on another World War II film, this time about the American Volunteer Group, or the Flying Tigers. The movie was tentatively titled "Flying Tiger Heroes" and Woo is reported as saying it will feature "The most spectacular aerial battle scenes ever seen in Chinese cinema." It was not clear whether Woo would not be directing the earlier war film, or whether it was put on the back burner. Woo has stated that Flying Tiger Heroes would be an "extremely important production" and will "emphasise US-Chinese friendship and the contributions of the Flying Tigers and the Yunnan people during the war of resistance." Woo has announced he will be using IMAX cameras to film the Flying Tigers project. "It has always been a dream of mine to explore shooting with IMAX cameras and to work in the IMAX format, and the strong visual element of this film is incredibly well-suited to the tastes of cinemagoers today [...] Using IMAX for Flying Tigers would create a new experience for the audience, and I think it would be another breakthrough for Chinese movies".