Regarding special boxes and the sort

So today they just released the community day box in the shop, which seems fine and all, but I probably will not get. Since they just released the boxes for sinnoh not too long ago, and just released this community day box, can it be expected there will be a box for Halloween, which presumably will start Monday or Tuesday? None of the boxes currently out impress me, and I was hoping there would be a new set of boxes for the halloween event, but considering the sinnoh boxes have only been out for a little bit now, do you think there just will not be new boxes for the Halloween event? This time last year I did not play, but I did read about the Halloween box from last year. Is it too soon for there to be new boxes, or has there been similar situations where big events were close together and boxes just cycle within a few weeks? On a side note, is there a pattern for how often they change boxes? I'm mainly looking/hoping for new boxes because I want a better raid pass deal, as it seems like out of the current boxes none of them seem to be that good in that regard.