In "Lonesome Road", the player is contacted by the original Courier Six, Ulysses, who refused to deliver the Platinum Chip at the start of Fallout: New Vegas. Ulysses will tell you why he begged out of delivering the Chip on condition you run an errand for him through the hurricane-swept canyons of The Divide. This DLC will cost $9.99 USD (1600 Microsoft Points).
As for the preorder DLC, the packs include:
* Courier’s Stash (Xbox LIVE for 160 Microsoft points, PlayStation Network and Steam for $1.99) gives players immediate access to four content bundles previously available only through pre-ordering Fallout: New Vegas. The Caravan Pack, Classic Pack, Mercenary Pack and Tribal Pack each offer unique weapons, apparel and aid advantages that will help you throughout your journey.
* Gun Runners’ Arsenal (Xbox LIVE for 320 Microsoft points, PlayStation Network and Steam for $3.99) increases the range of unique weapons, weapon mods, ammo types and recipes waiting to be uncovered in the vast Mojave Wasteland.
"Lonesome Road" is reportedly the final DLC for Fallout: New Vegas.