I voted Meyers, but it also brings up a very important point. Which one of New Vegas's many endings will be considered canon? My money's on Mr. House, but I can also see the NCR one. What would be nice is a sort of character import, but that's very unlikely.
It really would be too much work, as you'd in the example of NV ending have to write 4 different versions of your main storyline that would further have to be tweeked but each little change you did or didn't do.
If you look at games that did allow save or character import (ME for example) Very little of what happened in the previous game is really mentioned, and very little if anything changes. I'm also pulling for a house ending as canon.
@Night hawk
Definitions of "canon"
# a rule or especially body of rules or principles generally established as valid and fundamental in a field or art or philosophy; "the neoclassical canon"; "canons of polite society"
# a priest who is a member of a cathedral chapter
# canyon: a ravine formed by a river in an area with little rainfall
# a contrapuntal piece of music in which a melody in one part is imitated exactly in other parts
# a complete list of saints that have been recognized by the Roman Catholic Church
# a collection of books accepted as holy scripture especially the books of the Bible recognized by any Christian church as genuine and inspired
Look at the one I Bolded and underlined. Do you understand now?