It has been revealed on the official Fallout forums, that the next piece of downloadable content for Fallout: New Vegas, will only arrive once the next patch has gone live.
Speaking on the forums, senior producer Jason Bergman said: "Our next DLC release (announcement coming very soon, we promise) has been complete while we worked on getting a patch ready for you all.
"It should be released in the next couple of weeks on 360, PS3 and PC (can't be more specific than that, I'm afraid, although PC will almost certainly get it first)."
The patch will improve general stability of the game, while also ensuring that troublesome bugs are fixed. Weapons will also be balanced, alongside other requested fixes by ysers.