>>58169971
Anon... there are 26 new megas. If they keep the pace of a new mega every thursday only 9 new megas will be officially revealed by the time Z-A releases.
Even if they reveal the megas of the three starters at same time AND then the megas of the Kalos starters at same time too, that's only 4 more megas, a total of 13 megas revealed before the game comes out, only half of the total.