If they're trying increase hype for each Mega, why would they release all of the "popular" ones now, and the "meh" ones with the game? Could you honestly say that if Mega Flygon had been released in this past week, and Mega Beedrill was released with the game (assuming that there is, in fact, a Mega Flygon, and that it will be released with the game), that Beedrill will receive anywhere near the level of attention that it is now, or Flygon would receive then?
Mega Flygon, Milotic, Butterfree, Maractus, whatever, if it's going to happen in this generation, then it already exists. It's not like they're going to draw a couple of names out of a hat, and have the development crew quickly develop a mega in time for the next publication of CoroCoro. There's just no point in freaking out because "no name" Pokemon like Beedrill, Pidgeot, and Audino have been released, and Mega Flygon has not been.
Mega Flygon, Milotic, Butterfree, Maractus, whatever, if it's going to happen in this generation, then it already exists. It's not like they're going to draw a couple of names out of a hat, and have the development crew quickly develop a mega in time for the next publication of CoroCoro. There's just no point in freaking out because "no name" Pokemon like Beedrill, Pidgeot, and Audino have been released, and Mega Flygon has not been.