You may remember that the mission for the German Commandos in the book was to eliminate Churchill and that in the end, the man they were aiming at turned out to be a decoy.
So as the Eldar can foresee what might happen, it doesn't seem too far fetched that they might employ decoys for their leaders.
Of course, it might simply be the thirty year old Eldrad meeting his younger, plastic, self. This episode of Dr Who has been brought to you by Keela Mensha Kaine.
I think this shows that the new figure is an homage to the old Jes Goodwin Eldrad. And that the original Eldrad Sculpt was outstanding and, IMHO, still doesn't look too bad today.
Old Eldrad was the first ever figure I had pro-painted. but that was a llooonnngggg time ago.
The new Eldrad was painted by Raven's Nest Painting.