Obsidian has said they will not do a DLC that continues the main story like Fallout 3 placing you back on the world map after the original ending cause of how they built the core games story it just defeat the purpose of aspect that make up New Vegas
Alright so a work around would basically allow via a DLC to allow you to simple put use a >New Game Plus< feature when you select this option you'll be ask to choose a previous save does not need to be a specific save it can be any so if you have a level 15 character for example I would start my
>New Game Plus< with my total skill points that where earned to be used right off the bat as well as my caps on the side
in addition you would have all the ammo or anything that does not wight anything on you
but the cool thing is all the location you had been to would be marked on your map and ready to fast travel to right away
I wouldn't mind a New Game Plus option where you restart the game Doc Mitchell revives you with all your leveled stats. Solves both problems, I think.
This is win :intergalactic: