Good idea?
DLC add-on for either fallout, different possibilities for each obviously. Good two player example is Saints Row: the Third, how they have their two player mode set up.
Fallout 3: ability to trade with each other, do quests separately or together. Keep it simple, just with an extra player.
Fallout New Vegas: could also be kept simple, or going in depth, go against other player by helping the factions of your choice. (one player helping Mr. House/NCR while other can help the Legion if they want.)
All in all, just something to keep these games going and better. To be able to play either of these split-screen/LIVE could be fun.
Any thoughts or ways that would make it even better?