Flatland (2002)

In the not-so-distant-future of 2010, three young Americans—Amy, JT and Quentin—are visiting Shanghai, when they get shanghaied by mysterious Mr Smith and taken to Flatland, a place where past and present meet, literally. The only way out for the trio is to agree to fight Khan for him, an evil ancient warrior living through his reincarnations, and capable of destroying the world if not stopped in time.