Originally Posted by Fat Aeromence
alright, i think the ability overdrive on kyurem is only available on bw2, which will mean that freeze shock / ice burn take 0 turns to charge, and both those moves have the secret secondary effect to change kyurems form. thats my theory
I see one major hole in your reasoning here:
If, and this is pretty likely, Freeze Shock and Ice Burn are Kyurem-exclusive moves, then why would GameFreak want to make them with a charge-up turn, only for the only Pokémon to learn them to negate it with its ability? It's like giving recoil to a move that can only be learned by Pokémon with Rock Head, only worse, 'cause Freeze Shock and Ice Burn can't even be chosen by Metronome. Why would they go to such great lengths to troll Smeargle?
Negating the charge turn is a fool's dream, I think.
Also, why do people think a new ability will be introduced mid-gen? It essentially screws over backwards compability (abilities can't be changed, meaning that Overdrive Kuyrem couldn't even be hooked up to a B/W1 game). Deoxys, Shaymin, Giratina and Rotom change formes without using abilities, and, lo and behold, they are all always backwards-compatible to their games of origin.