Fallout: New Vegas - More DLC Speculation

MTV Multiplayer looks at hints in Fallout: New Vegas and Dead Money they think point to future DLC.  They discuss The Burned Man, which has been speculated before, a place called The Big Empty and "the other courier":

One of the characters you meet in the Sierra Madre is Christine. She starts off as a mute, but eventually you discover that she's actually a member of the Brotherhood of Steel. Her mission was to track down Father Elijah, the main antagonist of "Dead Money," and bring him to justice. Unfortunately, in tracking him down, she was captured and held in something she calls The Big Empty. It's here that she was experimented on, as evidenced her numerous scars.

They go on to explain The Big Empty originated with Van Buren - a snip from an old Chris Avellone interview at NMA:

"...my favorite was the Big Empty (the Big Mt. Training facility run by Mr. Handys). There was lots of military-inspired goodness, plus an obstacle course we planned for a player to be able to run, using their different skillsets to outwit the mechanical judges and training officers."

Thanks to Omega for this and a number of other tips.