At the end of Dead Money we are given two pieces of information (potentially) that strongly hint at future DLC regarding our courier:
"At times, Christine thinks of the Courier, who had kept Elijah's hand from her throat. The Courier had reminded her of the other courier she had met in the Big Empty, and wonders if the two had found each other at last. She does not think of them again until she hears the legends of the Divide. The Divide, where the two messengers, the two couriers, fight beneath an ancient flag, at the edge of the world."
and
"The new voice does not think of the Courier again until the battle at the Divide reaches his ears. The battle between the two couriers, beneath the torn skies and the Old World flag... each bearing a message for the other."
Now, this sounds pretty epic does it not? An intense battle between ourselves and another courier (who is known to be Ulysses). The thing is, this doesn't seem like the kind of thing to randomly happen while wandering the Mojave in between quests for the NCR/Legion/Whoever. I just can't see us having some kind of epic battle at "the edge of the world" then wandering back to the Mojave to fight at Hoover Dam. It would make a lot more sense for this to be what happens to the Courier after they have finished with New Vegas and carried on with their lives.
I am not suggesting that it will be like Broken Steel where you can then wander around as you like afterwards, I am thinking more along the lines of "Awakenings" in the Bioware game Dragon Age: Origins, where it carries on the main story, but has it's own ending, almost like adding another final chapter in a book.
Does anybody else agree?