World at War Der Riese had 4(One near Juggernog, one by the Double-barrel shotgun, one near Quick Revive[by teleporter C], and one in the zombie-spawn window across from the Trench Gun).
Black Ops Der Riese had 2(one by the double-barrel/sawed-off, one near location of Quick Revive[by teleporter C])
Black Ops 3 The Giant once again had all 4 question marks, in the same locations as the original.
I also noticed something that's probably a coincidence, but knowing Treyarch, maybe not. On The Giant loading screen, the labels for teleporter A, teleporter B, and teleporter C are all underlined. If you look at the yellow line under Teleporter A, it traces a path from the window barrier to the Die Glocke circle, an exact straight shot to activate the Fly Trap EE. The yellow line under Teleporter B leads from the little balcony to the hanged man. Straight shot, again. Teleporter C yellow line has me beat though, goes through a wall. Any thoughts or insight on any of this?