I guess the term "false advertising" has reared its ugly head again. Because, when Li's Fearless came out in theaters, it was said that it was his last film appearance. Fast forward to the present, the movie War will be coming out soon and guess who is starring in that one, it's Jet Li. I guess his deal was to big to give up.
Yes, this bit of advertising can be confusing, but it's not actually a lie.
When Fearless came out, the ads said it was Jet Li in his last Martial Arts Epic, not film. It was the last Wuxia (Crouching Tiger, etc) film that he would do, not the last film. He's now going more for action films rather than the martial arts fantasy films.
Here's a pretty good wikipedia writeup about the Wuxia genre: http://en.wikipedia.org/wiki/Wuxia (http://en.wikipedia.org/wiki/Wuxia)
Last one so far he's produced. Acting is his job, production is his choice.
He said it was his "last martial arts epic." (a la Once Upon a Time in China, Hero, etc.)
Not last movie...