well the murano is the midsize fwd based suv. I guess the xterra would be the mid-size rwd based suv. and since the qx55 is going to be full sized and based off of the titan I'd imagine the same will happen to the pathfinder.

Bear in mind all of this is my own personal speculation since nissan said that the frontier will be going up size to the size of the tundra which would mean that the xterra would follow suit. I dont know if the x-trail does make it here but nissans plans do make room for it. and since the qx55 will be full sized im assuming that the pathfinder will be also.

No guarantees or promises. Just deductive reasoning. But who knows how reasonable nissan is going to be.