I'd like to see the rise of the yes man in place of mister house, or even Mr House somehow merging with the yes man ? I like the idea of the machines as a faction, with their own agendas that hopefully aren't as plain as FO:Tactics which just felt like they took the terminator storyline :/
I really don't care for the Legion. I just don't find the whole Roman empire thing appealing and especially don't buy Caesar's whole story of preacher turned psychotic, Roman empire obsessed, tyrant. I'm hoping they can evolve the Legion into something far more original, possibly a reforming of the legion ? If they went with the return of the Legate believing your [censored] that there were traitors trying to take his thrown that could have him triggering a war amongst themselves and a reforming of the Legion into a new faction or factions.
Rise of the great Khans and the return of the brother hood would be interesting too.
You do realize that Ceaser has civilized the conquer regions, the areas are safe to travel in, and fair better economically than other territories. Not only that but Ceaser and his generals have a profound respect over strong warriors in the tribes he conquers.
I'll quote Tiberius Ceaser: “It is the duty of a good shepherd to shear his sheep, not to skin them.”, While he may be cruel he has made sure his power is absolute, and for his boldness he has the respect of these once raiders. As long as Ceaser lives his rule will be absolute. While the NCR may have big guns they do not have ideals. Look at the Legion prisoner at Nelson, even at the perils of death his centurions of conquered tribes are ferociously loyal. Do you really believe that the NCR stands any sort of a chance?