I imagine I'michael wondering this query WAY too earlier, but I kinda question which ending óf the four will be cannon. I just got carried out with thé NCR ending ánd it's almost similar to the Individual New Vegas ending and the Mister.House ending. The order of battle is nearly the same between those 3 endings and the finish is quite very much the exact same, face-off ágainst Lanius than á conflict/congratulations presentation with general oliver.
Jun 25, 2012 re: New Vegas canon ending (.SPOILERS are likely.) To be honest, any ending could be canon. Usually the ending that leaves everyone at peace is the one chosen though.