I typed up a long post in response to another thread, then accidentally hit backspace to delete a typo and instead my browser went back to the last page. Rather than lament all the hard work (and 15 min of my lunch break) I have lost, I thought I'd start a new thread that would be a bit more on-topic.
The following predictions are highlights that I hope will at the very least spark discussion, but ideally would force some people to rethink what they plan to run for GenCon and ultimately add a bit more balance to the environment.
Aggro decks will dominate this year. Whether it's wildlings or Martell maesters, aggro decks are much faster and have access to all the "right" tools to win this year. Specifically, this year they have much faster access to bigger characters with Wildlings on the rise, Manning the City Walls, and the Conclave. They also have efficient character control with easier access to Die by the Sword, No Quarter, Meera (Stark only), Seductive promise (bigger characters); location control with Price of War, A City Besieged, and Meera; and hand protection with Lanni and Martell aggro decks both viable, while Bara has The Laughing Storm (Bara) and Stark has Knight of Harrenhal (plus a good amount of intrigue icons as well). Aggro decks also have better hand control this year, with the exception of Greyjoy (which has MUCH better saves now than before). Lanni and Martell aggro always had strong intrigue, and this year they have competitive aggro builds; Bara has easier access to the (now unrestricted) Laughing Storm; Stark has Knight of Harrenhal and a growing number of intrigue icons on very playable characters.
City plots will be very common. Manning the City Walls adds speed to aggro, while At the Gates can be used to pull a learned crest to fuel Outwit and protect against a round-2 Valar Morghulis. This also gives aggro (or any deck) easy access to A City Besieged to knock out a Ghaston Grey or some other problematic location on round 2-3.
Control decks are going to have a tough time this year. Just to elaborate a bit on the above points, aggro decks won't have the traditional vulnerabilities they had when they played more weenies. Martell's Ghaston Grey and Game of Cyvasse can have trouble dealing with the high STR and *printed* cost of the aggro characters (especially armies). Targ burn has an even harder time against armies, which frequently carry the "no attachments" keyword. The addition of Incinerate could help marginally, but overall this is going to be a very tough year for Targ burn because the important characters to keep around (armies, the conclave, etc.) have a much higher STR this year. Stark's Bear Island decks could prove pretty strong this year, if they can win some early challenges with stealth (Meera will be hugely helpful) and keep Bear Island on the board long enough to matter. But Bear Island is usually found in aggro decks. In fact, the best aggro decks will likely have more control mechanics in them this year than before, because they have more control options.
Characters that rely overly on low-cost characters are going to be at a big disadvantage. These decks might have a chance if they are fast enough to slam the opponent early in the game. But round-1 Fear of Winter or Blockade probably isn't enough to dominate an opponent who can drop a Viper's Bannerman, Northern Cavalry Flank or some other huge army on round 1 with a 2-claim plot. Meanwhile, First Snow of Winter, Targ burn, and Narrow Escape seem to be growing in popularity. Winning 2-claim military challenges just isn't enough to be competitive. Players will need big characters that are difficult to remove from play to stand a chance against the control that does exist, and the average card in deck will need to be much better than the 1-3 STR chud to have a shot at winning a long-game.
Any other predictions? I'm especially interested to hear if people disagree with my assessment!