dhobikikutti is
highlighting some non-Western source texts and characters among the nominated
yuletide fandoms and
encouraging people to offer and write them, and to
be thoughtful about it. There are a lot more fandoms suggested in the comments. A lot of these are single books or movies, so even if they're not familiar now, there's time to check them out in the next six weeks, so at least you'll be prepared to write someone an extra treat come Yuletide Madness.
dhobikikutti also points to
thingswithwings' observation that even for a lot of the small fandoms where characters of color are central in the source texts, the fics in the archive focus on white characters. This is a problem I've noticed in the past too, including in my own Yuletide fics, so it's a good thing to keep in mind as we get ready for sign-ups in another week or two.
ETA: You can follow this challenge at
dark_agenda.