So we now have necromancy. It's the only system implemented so far, but it's caused epic stories nonetheless. I suppose I could put Lycanthropy in there with magick, but I don't feel it truly belongs on the same wavelength, so Necromancy it is.
From here there are countless schools and practices of magick, occultism, mysticism, etc that could appear. From Pyromancy to Shamanism to old school 'sympathetic' magick using wax figures and heated nails - it all depends on what Toady feels like doing on this particular subject, but knowing Dwarf Fortress, whatever it is will have insane consequences.
But, I'd like to hear other peoples visions for the future of magick in this game, regardless of whether they expect it tobe done in the next ten thousand years.
I was personally trying to work out how something like Shamanism might work. I think it could be interesting - they could brew all these psychotropic drinks or whatever out of specific ingredients which would make them do weird things (the DF equivalent of Ayahausca), maybe tame some random local wildlife as a companion (unless there was some way in which they could obtain a spiritual animal companion, but I'm not sure how that would work gameplay wise) and do something scary with the surrounding wilderness - tree/plant Golems, anyone?
I have this hilarious image, several versions from now, of several different types of Magi showing up at a fortress, all at once, and fighting it out while you decide whether or not you want to engage these nut cases or just hold back and watch the fireworks.
So anyway, go crazy.