I don't think that KingPhan will be good enough w/ the huge amount of fire-type decks being in the format (Emboar/Magnezone, Emboar/Charizard G, Emboar/Reshiram). Donphan on it's own IMO will be one of the better, if not the best deck in the format (it usually will become one of the best decks if every single deck you come up with is shot down because Donphan beats it).
VileMagus will try to do what VileGar is doing now, but with the low HP and the x2 weakness to dark, it will come short. Gothitelle will end up taking the trainer-locking role sooner or later.
LostGar will probably make a strong push for a tier one deck, but it will need a way to take prizes still, something that it will struggle with.
In areas with little-no Donphan, dark type decks will rule. Disruption builds will be rampent in formats with supporter-based draw, but they will need to find a source of damage output.
Just my 2 cents here...