Apparently, this was mentioned at BlizzCon, but even reading all the marvelous coverage of BlizzCon here at WoW Insider, I managed to miss it. Drysc tells us that "as arena sets fall off they would make their way to the honor system. So when a season 3 set is released, season 1 would fall off the arena vendors and onto the honor vendors, but this may not include weapons."
So! Have you been hoarding up your honor points for that one great day when you'd be able to buy something epic with them? Are you prepared for hours and hours of hanging out in battlegrounds in order to get your desired set without having to do well in the arenas? If your answer to any of those questions is yes, you may be in luck. No official word on when Season three will come along however.