To go further into the thought on the DLC, the premise from the sounds of it is that Pigsy is tired of being lonely and wants to build his perfect fembot. At least this is the sum up from the press release and trailer. But this will also give you a little bit of further insight into what other "survivors" in the world are up to. Not to mention another reason to pick up Enslaved again, outside of cleaning up missed trophies/achievements.
Oh, on top of this, there will be another nice addition in the 3D department. Those who pick up this DLC will also be getting an upgrade to the overall game that allows for it to be seen in stereoscopic 3D. That means you will just need special glasses to enjoy the 3D here and not glasses and new TV. Why Ninja Theory is requiring people to buy the DLC to get the 3D upgrade I have no clue.
Not a big fan of the 3D upgrade but at least the DLC sounds to be a nice addition to the game. I wouldn't mind playing through a few levels as Pigsy. I just wish the price was a bit lower or there was an option for just the new content and not the 3D. I am sure that is why it will $9.99 instead of $4.99.