ultimate prediction:
Ok, I know everyone's all excited cuz Mag has died down with Empoleon running every where. This of course raises awareness of grass and other types that haven't really been explored much since then. We'll probably see some older decks touched up a bit and some new ones of course. In no particular order
Porygon(The X will definitely get SOMEONE to play it)
Sceppy/Growth/Grass(Sceptile/Leafeon included)
Skittles
GG/PLOX
Chomp variants
Maggie
Empoleon
RockBand
Blissey
Eeveelution variants
Hurricane(one or two in seniors..? lol)
Delta Decks(Flygon, RaiEggs, etc. ..They've been brought up and Flygon's been looking to do decent).
SD via Team R
SD via Random
there ya go.
Oh for future refrence: Hurricane only won a few cities and topped at some states in seniors. Regs is an enigma