This week we'll be talking about Volcanion, the currently unreleased event Pokemon. What will happen to Volcanion this generation? What game will he show up in? Will he get a new form or Mega Evolution?
I'd like to point out the possibility that it might not even be an event Pokémon.
I know it is highly likely that it is one (coming after the other 2 events of this generation in the dex and not being anywhere in XY), but it would be an interesting twist.
It could be just a regular legendary that's simply kept secret until the sequel-games, and of course it'd have to be last in the dex in this case too, since Diancie and Hoopa were revealed and distributed before it. It would be the first time a new non-event Pokemon was pseudo-introduced mid-generation.
I'm not betting on it though obviously, as it fits perfectly into the 1-event per release (XY->Diancie, ORAS->Hoopa, "Z"->Volcanion), but it would be neat. (and it would allow us to use it competitively in the same way Cresselia, Heatran, Latios etc can be).
The Deoxys from ORAS is also relevant to this point, as it was the first event-Pokémon (the reason it's banned in competitive play) that became obtainable in regular gameplay.
Personally I wish they'd treat all event-legends this way. Not encessarily make them obtainable without an event, but at least when you get them, there should be an actual encounter in an appropriate setting instead of it being handed to you by the Mailman <,<
As for forms... there is also Genesect, whose forms are extremely minor, and Keldeo whose form is basically aesthetic and more symbolic than an actual form.
I can see Volcanion getting a Mega, but not forms in the likes of Hoopa Unbound or Deoxys. The biggest form-shenanigans in the next games is clearly going to be about Zygarde, and maybe even Xerneas/Yveltal in some way. I don't see Volcanion playing as big a role as Hoopa did this round.
I also see a connection between Volcanion and Heatran (quadruped metallic creature about hot concepts granting them primary Fire-types: boiling VS melting), and wish it would somehow manifest itself once Volcanion becomes official.