Whelp, I done and gone beat the seventh gym.
TrainerTchock
Pokemans:





Separator, the Level 42 Samurott
15 Step, the Level 43 Darmanitan
Amnesiac, the Level 42 Archeops
Reckoner, the Level 42 Reuniclus
Optimistic, the Level 41 Fraxure
Airbag, the Level 44 Cobalion
My Darmanitan was able to outspeed and OHKO everything in the seventh gym. What a legend!
The new guys, Fraxure and Cobalion, have been very good as well. I only expect Cobalion to improve in usefulness; after seeing so many people complain about the Hydreigon, I just had to pick it up. It double-resists Dark and has normal resistance to Dragon, so with its higher speed I don't see it losing in a one-on-one. Fraxure is reliable, but doesn't stand out yet. Once it evolves, we'll see...
I still want to pick up a Mienshao, but I don't know what I'd get rid of on this team.
EDIT 2: I don't know how everybody feels about using legends during the main game. Personally, ever since Gen. IV (I didn't play R/S/E) I've adopted the "no ubers" rule for my single-player experience. Now, there are no ubers lists yet for B/W, but I feel that based on the performance of similar trios in the past (R/B/Y birds, G/S/C dogs, etc.) and his stats (Cobalion has a 580 total, less than Hydreigon (a non-legendary)) he's not likely to be put into the uber tier. I don't feel cheap by using him.
QUOTE
1. Hydreigon (we are definatley going to see this one being spammed in competitive if it isn't listed as an Uber).
I don't see it being any more significantly deadly than, say, Salamence or Dragonite. Hydreigon is powerful and has great all-around stats, but so do a lot of OU Pokemon. It also doesn't benefit from the one-two punch of Dragon Dance, because it's a specially-based Pokemon. Plus, it carries weaknesses to both Ice and Fighting, two very common attacking types in the metagame. That's not saying that he can't be very good (just look at Tyranitar, who carries a double weakness to Fighting) but it doesn't seem like an uber to me.
Also keep in mind that it just barely trails Salamence in speed (98 vs. 100 base). This may not seem significant, but in competitive play this is
huge because Salamence is almost always maxed out in Speed (as I suspect Hydreigon will be). A Jolly max speed Salamence will be able to keep any non-scarfed Hydreigon in check.
EDIT: ALSO keep in mind that because of it's Special Attack focus, it'll be relying on Draco Meteor to match/exceed the damage that other Dragons do with Outrage. And while Draco Meteor is more powerful, it suffers a slight accuracy drop (which can be infuriating) and lowers the users Special Attack two stages upon use (laymans terms: you've just halved your Special Attack); you pretty much have to switch out at that point unless you have some physical backup moves, meaning that Hydreigon will have a comparatively harder job sweeping than it's other Dragon brethren.