There was supposed to be some magic event in the works with Roberto Aguirre-Sacasa writing a mini-series. I haven't heard anything about that in a long time, though.
Frankly, I'm incredibly disappointed in Mystic Arcana. The whole story is so far on the fringes of Marvel that it seems utterly inconsequential. At least with Annihilation they included some major, recognizable characters like the Silver Surfer, Galactus, Thanos, et al. Mystic Arcana, on the other hand, gets shafted out of Marvel's two biggest magic icons, Dr. Strange and Thor. The characters included aren't really so bad themselves, but all of their stories feel completely pointless. What do I care about some coven's reaction to the Scarlet Witch's power as a kid? (Which, by the way, I'm not real fond of Mystic Arcana retconning Wanda's Avengers Disassembled reality-warping back into her childhood, either.) Although I personally like Sir Percy of Scandia and pretty much the entire Black Knight line, what does a dusty old story from King Arthur's time really have to do with anything? Don't even get me started on the Marvel Tarot, either. Storm is now some quasi-mystic? In fact, half of the major mystics are apparently mutants now. Again, no mention of Thor or any other pantheons, either. Ugh, the whole event just blows.