So, back in the original AD&D DMG, Gary Gygax included a list of inspirations in Appendix N.
From such sources, as well as just about any other imaginative writing or screenplay, you will be able to pluck kernels from which to grow the fruits of exciting campaigns. Good reading!
–Gary Gygax, Dungeon Masters Guide, Appendix N
You can see the full list right here. If you’re interested in my personal Appendix N, well I have a page for that just up and to your right.
The question is, what would a 4e version include? I suspect there would be less books and more movies and video games. We have 30 years of new material to draw on so who makes the cut? and what gets dropped?
Anything based on D&D itself doesn’t count. Hit me.