KosiorThe last couple of "preordered" magic boxes I've bought from Massdrop have been true to their word on release-day shipping. I was happily surprised when my Oath box showed up on the Monday after release (that vendor must have been located very close to me for me to get basically next day shipping), but realistically I'd expect it to arrive mid to late week after release. (4/12-4/15 in this case)
KosiorI do a couple of boxes from each drop for the new sets. They ship the day prior so depending on your location from the origin you should see them the week of release.