Chasing the Whale: According to Variety, Twentieth Century Fox has hired Doug Richardson to rewrite Die Hard 4, which is being developed under the supervision of star Bruce Willis and his Cheyenne Enterprises partner Arnold Rifkin.

Richardson just completed writing "Hostage," the Florent Siri-directed, Stratus-financed adaptation of the Robert Crais novel that stars Willis and will be distributed by Miramax.

The scribe has become a go-to guy for Willis and Rifkin, having scripted three Cheyenne projects: the Elmore Leonard novella adaptation "Tenkiller," "True Believers" and "Black Water Transit," a Revolution project.

The most recent example of a separate script considered for a sequel is "Passion of the Ark," a script by Bobby Florsheim and Josh Stolberg that Columbia bought. It may serve as the basis for a second installment of Bruce Almighty, with Jim Carrey and Tom Shadyac expected to reprise.

For Fox, another Die Hard could be a useful tentpole, especially with superhero franchise X-Menon uncertain ground after director Bryan Singer took the "Superman" job instead of X-Men 3.

Die Hard With A Vengeance grossed $100 million domestic and $254 million overseas. That beat "Die Hard 2," which grossed $100 million domestic and $119 foreign. The original Die Hard grossed $83 million domestic.

John McTiernan directed the original and third installment, but it is unclear whether he will return for a third film.

Dont't forget to also check out: Live Free or Die Hard

Live Free or Die Hard was released June 27th, 2007 and stars Bruce Willis, Timothy Olyphant, Justin Long, Maggie Q, Cliff Curtis, Jonathan Sadowski, Andrew Friedman, Kevin Smith. The film is directed by Len Wiseman.