I think a pretty cool map could be made of this. The movie is in public domain so copyright issues are not a factor. That said, I don't have the tools or skill to make it, but I have some ideas on how it could be done.
There's a zombie map that was in development but then went on vacation. I don't think it's abandonded for good though. Plus - it will have Widowmakers doing the graphics. I think it's a safer route (generic zombies) rather than a NOTLD theme.