therian and non-therian landorus, Terrakion, the Conkeldurr lead i mention earlier, Tyranitar seems fairly popular, throwing up sand for Excadrill. Haxorus is popular; I've seen banded, scarfed, and sashed. Sash Weavile is popular as well, and can be a severe problem for unprepared dragon spammers, but if you bring ttar you pretty much auto win. Therian Tornadus is annoying for my team, but I have only seen 2 in 60+ battles. The tao trio (all formes) seem popular, with Kyurem-W being the most, base Kyurem being the least. I've face one trick room team so far, set up by a Meloetta (!). Keldeo is popular, as I'm sure it deals with quite a bit, but the worst it has every done to me was piddling damage from an aqua jet on my Zekrom, and K.O.ing Tornadus after first turn tailwind (not entirely sure why he didn't switch, as I predicted; either way, I was able to set the sweep). I see quite a few Tornadus as well, though only in team preview. igalith seems popular; I assume as a counter to Zekrom. If you catch zek with Gigalith after the first outrage, he can r-kill with Earthquake after sturdy tanking the second rage. Genesect is popular as well, though I've only faced 4 all but one with mine under tailwind, giving me first flamethrower. The 4th was able to finish me off after i misjudged how much damage an earth power would deal to Reshiram (120 Sp. Def.??? Why did no one warn me??? lol). Lucario seems to be on every other team, though I never have a problem with it; everyone tries to tank outrages on him, and get paralyzed by tornadus after their extremespeed doesn't K.O.
That's all I have for now. Will update with more later if they come up.