I know it's not practical to suggest my proposal here, but regardless I know I am not the only member of staff in Smogon who's determined to give certain suspects another chance in B&W2.
Those Pokemon I'd like to nominate are as follows: Garchomp, Thundurus and Excadrill.
With Keldeo's release a whisper away, it's safe to say that rain teams will welcome his arrival with open arms. Volturn is ever present, and announcements are presenting us with exclusive changes to particular movesets on standard Pokemon, which are surely going to shake things up for the better.
Whether these changes are a benefit to any individual Pokemon or not is another question, but I think we can all assume common Pokemon like Salamence and Dragonite have been given more support; more so than being restricted. Generally BW2 is going to loosen up the competitive scene.
So, a lot of us are eagerly awaiting the complete makeover. Perhaps not immediately, but some where along the line, am I getting ahead of myself by asking us as a community to reconsider Garchomp (Rough Skin, when legal), Excadrill and Thundurus?
Fact is, those three suggested would be a huge relief on building different styles of teams. We can check Volturn much easier with Thundurus' new ability; Garchomp also covers Volturn remarkably well; and even Excadrill helps balance between offense, defense and hazard support.
They may stick out more so than some OU Pokemon, but at the end of the day they don't summon weather: weather IS gen 5. Right now I think rain is lacking, but that's not recognising how those boosted Water-type attacks force you to run Tyranitar/Gastrodon.
I want to ask you guys what you think before we all jump in the deep end and say: "we've banned them already, so no". I can tell you now I strongly believe rejuvenating the suspect system for the sake of a constructively active metagame is the way to go.