nope The data-mined revolves around Claptraps--specifically a Ninja Claptrap designed to keep the heroes of Borderlands from accessing the Vault--including new quests, locations, and enemies. Back in October, Shacknews interviewed Gearbox's Mikey Neumann, who promised we would be seeing more of the "Ninja Assassin Claptrap" seen after the end credits of Borderlands.
As the amount of data tips this onto the side of probable, I won't detail all of the information found as it likely contains spoilers, but curious readers can find all of the information in the forum post.
Gearbox president Randy Pitchford cautions that the information is misleading and should not be taken at face value. In a statement to IGN, he gives some context to the leak:
There are a few things there, but I think it's like reading a draft of a script for a movie that hasn't even been announced yet, let alone launched - yeah you might learn something, but it's not the real thing and it could just drive you crazy thinking about it.
A 2K representative has told Shacknews the company will be announcing new Borderlands content soon, but no additional information at this time.