So now we know everything about the new megas, etc. in ORAS. This reveals a very sad truth: Unless there are megas in the full games that are not in the demo (which seems unlikely; why would GF add data for Megas other than Steelix, Glalie, Sceptile, Swampert, and Blaziken?), we will not be seeing Mega Flygon or Milotic.
But at least the demo doesn't reveal very much about what will happen in-game. In case anyone's interested, I will still be doing a research run through Alpha Sapphire and posting info about the routes, trainers, random encounters, etc.