Because nothing is ever normal when it comes to something Duke related, the original developers of Duke Nukem Forever, Duke 3D, Shadow Warrior, etc etc have been bought out and are now owned by Interceptor Entertainment. A Danish site first brought up the news but the CEO confirmed it here and a full press release will be made tomorrow.
This is actually pretty good news, because one thing 3DRealms never did (besides finish something this side of the millennium) was they never allowed fans to mod their stuff to other engines, like making Duke3D mods on the Source Engine for instance. The Duke Nukem IP is still owned by gearbox (maybe? there's a bunch of legal crap going on right now) but 3DRealms still has the rights to any Duke games before DNF. This includes my second favorite Duke game, Zero Hour, which I think could possibly get re-released or at least remade for modern consoles/PC.
Interceptor Entertainment might be a new company with only one game released, one game canceled, and another currently in limbo, but they seem to be more open to the community than both 3DRealms and Gearbox combined.
I welcome this change and only hope this means we could get a really really really really good Duke game again.