Tonight on PC/NA I ran through IC Sewers with some friends intent on punching Molag Bal in the face. As soon as we got to the center of the sewers we see the portals up, but not a monster to be found in front of them. This happened first in the Axe of Belharza. Thinking it may have just been a campaign-specific bug we hopped over to Haderus, made our trek back to the center of the sewers and again no mobs in front of the glowing center portals and no Molag Bal was no where to be seen.
Did he get lonely and move on?