I noticed lately a lot of talk about a XY-on format come rotation and I was wondering if XY-on has been officially confirmed at any point or if this is just the supposed format. For instance, is there any reason we wouldn't have,say, a Legendary Treasures-on Format? I understand people's logic behind assuming a XY-on format, but in my personal opinion, a Legendary Treasures-on format wouldn't be that Farfetch'd(yes, the misspell is intentional and no, I am not sorry). It would still cause the rotation of 4 sets(not unheard of) and still leave 11-12 sets in the format(counting the 3-4 that will inevitably come out next year). Just a thought.