The same 3 decks that are doing well now: Blissey, Magmortar, G&G (all with little updates for the new cards) and then probably 1 or 2 decks from GE.
Exploud is decent, but it's weak to the most popular deck right now (G&G), it's first attack is very random (although the effects are nice) and it's second attack only works in a boost-filled environment. I think the weakness to G&G by itself should eliminate it's use by itself.
Porygon Z and 2 is in the set but not the lv.X. You might see people playing the line either way, but without the lv.X, you lose a bit of the abilities the deck once had.
Darkrai will see lots of play, just because of the hype. I don't know how well it will do though. It's weak to G&G, and that alone could make it unplayable.
There are plenty of decent cards in GE, but that doesn't cut it anymore. You have to be overpowered to even stand a chance in the current format. Look at the decks doing well now. They all have attacks that can scale damage. Gallade's damage scales with prizes flipped over, Blissey and Magmortar with energy on them. Two out of three of the decks abuse lv.Xs that have messed up attacks. Two out of three abuse poke-powers to help setup. Follow those guidelines with another deck and you might do well. Anything else? Not so much.
