Blizzard has released a preview of the Rogue Tier 13 armor set that will be available in World of Warcraft Patch 4.3. You can click on the above image to view a larger version. Here's their description of the Blackfang Battleweave:
"A 'bat-themed' armor set for rogues seems like a no-brainer, but we were careful to skirt the more obvious inspirations. World of Warcraft often makes playful references to pop culture, but it’s important -- particularly with player gear -- that what we create has integrity within our universe. Rogues look good in close-fitting masks, collars, and cowls rather than elaborate armored helms. It also helps reinforce the rogue's sneaky silhouette if the shoulder pads have a streamlined shape... even if that shape has sharp, bladed details."
In addition to the Tier 13 reveal, Blizzard has posted a visual guide to rogue Tiers 1-12 for Transmogrification purposes. You can view the rogue's armor history after the jump, and check out Wowhead's guide to find all your old tier gear. Also, be sure to browse through all of the currently released Tier 13 previews.