the meteors might be piled there decoratively and not be specificly tied to forms, bringing Deoxys there might just do what they did for Rotom and let him pick a form from a menu.
Or so Occams Razor might dictate.
I don't know about that, in either way why add another meteor. Sure they could just be trolling us, but why not just leave it at four like previous gens? --- Only insecure and ignorant people try to debase someone online based on their username.