you can do this using tags in kodi. i am using this to accomplish your goal right now. i am using it to trigger sequences for boutique bumpers (Shout / Scream Factory now - i plan on making ones for Vinegar Syndrome and others soon)
I would like this implementation if it could be operated like the audio bumpers.
based on the genre, in sequence, have it play a certain bumper that matches that item.
instead of DTS, Atmos, etc, you could have Christmas, Horror, etc.
maybe a movie.title.PSE_foldername format where it parses the foldername and gets random content from that folder.
it would need some kind of PSE indicator as Christmas is in a lot of titles. this would prevent unintended triggering of a bumper.