How does Willis’s dream change by the end of the novel? Why does the role of “Kung Fu Guy” no longer hold the same allure for him?

In an emotional speech, Wu admits he is guilty of putting himself in the category of Generic Asian Man, and that even Kung Fu Guy is a variation of this type. Even Kung Fu Dad wasn't just another role. As the crowd in the courtroom becomes raucous, Older Brother and Wu try to kung fu fight their way out of the room—"plan B." In the chaos a gun goes off and Wu dies. Turner and Green stand over his body and deliver lines. Wu opens his eyes and says he can't do this anymore. The detectives agree and wish him well. He opens his eyes again and is with his mother, ex-wife, and daughter.