The Black Armor and Collector's Editions of Dark Souls 2 will include access to a "Black Armor Weapons Pack," letting you use a special set of armor and weapons early. The set is pretty extensive, and would naturally make the game a bit easier at the outset, so Dark Souls devotees are more likely to go without.
If you do decide to use it, like a coward, you'll get access to the Black Flamestone Dagger and Black Flamestone Parma, Yellow Quartz Longsword and Yellow Quartz Shield, Bound Hand Axe and Bound Wooden Shield, Homunculus Mace and Homunculus Wooden Shield, and Transgressor's Staff and Leather Shield. The vouchers are called "early access" so it seems likely you'll be able to find this equipment through the natural course of the game as well.
The Black Armor Edition also includes a metal case and soundtrack for $59.99. The Collector's Edition is $119.99, and also includes a Warrior Knight figurine, hardbound art book, and cloth map. It launches March 11.