. new vegas prob won't have much in common with FO3 as far as story goes, just a guess.
Hope so, both for FO4 and NV. FO3 strayed too far from its roots, sure it was more fps, but the plot just didnt seem like something the old publishers would like. I hope they get away from the "enclave=evil, BoS=good" thing they had in FO3, since the BoS would actully kill you in the other FOs, or just not add those two factions at all.
But back on topic, just like it was said earlier, the Commonwealth just wouldnt work as an expansion, and frankly, I wouldnt want to see it as an FO3 add-on. Im sure Fo4 will give us more Commonwealth goodies, especially since it wouldnt work as good in a fps style game like Fo3.
And lastly, for about the sixth time, Bethesda has no plans to make anymore DLC after MZ for FO3, unless they get an idea that will blow us away or are held a gun point, then i doubt we'll see anymore FO3 DLC.