Personally I hate the cannon endings and as far as I'm concerned they are total crap. If the devs decided to just go with the cannon endings and "screw" everything else, I would deffinately not buy it.
But I'm sure that the devs are smart enough not to do something so stupid, and considering that they haven't done it before in K2, I doubt they will do it in k3.
"Some see how things are and ask, 'Why?' I dream of things that have never been and ask, 'Why not?'" - Robert F. Kennedy
In my mind's eye, 3P0.