I thought you might like to know that I'm currently building a massive Duke 3D cityscape containing all the best levels in one - in Minecraft, with the Dukecraft texture pack of course.
It will let you play through most of the major city levels from Duke Nukem. The scenes are not exactly the same as the originals, but the themes and objectives are very similar, thus the experience will be nostalgic as well as original!
Here's some screenshots at the DukeCraft Imgur:
Having so many 'levels' in the same map allows some cool advantages. Expect to see a Rabid Transit system to travel between zones after unlocking each area, for returning to get items etc... it's going to be a very exciting Duke experience...
There'll be tonnes of explosive things, secret areas, special devices, visual jokes and epic battles...
Level design suggestions welcome!