To that end Appendix N(ew) should contain stuff that people actually have found inspirational towards writing the rules or building a campaign.
I agree. And that's why at least Harry Potter and Pokemon should probably be left out. Trying to use them as inspiration for a D&D campaign will not work very well. I'm sure a great DM might work it out, but someone for whom the appendix is meant would just get frustrated. Better mention great titles that D&D can easily emulate.