ICE TRAIL - CHAPTER 1
FAIRY TAIL ZERO - CHAPTER 1
Yep, we get two new monthly spin-offs. One tells the story of a young Gray (drawn by one of his assistance, but supervised by Mashima) while the other explain Mavi's and FT Guild's origin. Both are canon.
Oh yeah, Makarov's father was confirmed to be one the founders of the Guild, also the past sure was more bloody with their guild wars...