The new Duke Nukem is currently under works by Gear Box Software. It has been in production since 1997, just a year after its last game was released Duke Nukem 3D. Considered vapourware (unreleased software, due being unfinished). tHe game was originally being produced by 3D Realms, which has reported that it will released when ready. In 2009 3D Realms was downsized due to financial problems leaving Duke on the back burner. Take Two who own the publishing rights the franchise filled a lawsuit against 3D Realms due to not finishing the product in 2009 and has since been handed over to Gear Box to be finished. After 15 years in production the game is set to be released this year, but I fear more delays.
Duke Nukem Forever…taking forever.