Underworld director Len Wiseman has been tapped to helm Die Hard 4. Willis will be reprising his role of John McClane, the tough as nails New York detective who's already battled terrorists in Los Angeles, mercenaries terrorizing airplane passengers, and a mad bomber named Simon who threatened to detonate bombs throughout New York City.
The fourth film of the franchise is a timely tale of Internet sabotage. An attack on the United States' computer system has the country in a panic, with systems shutting down across the nation. Of course it's up to John McClane to figure out who's behind the attack.
Filming is expected to begin this month in Canada and Washington DC.
Source: The Hollywood Reporter

