I wouldn't mind it being his last fight. If he is going to fight Marquez a 4th time then maybe it is time to retire. I think this fight is a total waste of time. The only thing which can come out of it is giving Marquez another chance to beat Manny.
I don't care. Unless Marquez finally takes it, in which case I'd like to see a fifth chapter so Marquez can balance the scales at 2-2-1.. Then of course, we'd need a sixth for a tiebreaker... In the case of a Marquez loss or a draw, whatever. What Pacquiao does beyond that doesn't interest me in the slightest. Not even a Mayweather showdown would get me too excited (mainly because it would be the same now as it ever was, easy work & domination for PBF)