I think Valdor is still one of the High Lords of Terra, being the Emperor's Representative as there is no other Primarch or whatever to take that place, so it's obviously not him.
Well, obviously as far as they don't retcon it - which is obviously not unheard of.
Edit - obviously is obviously obvious is obviously obviously obvious.
Well, obviously as far as they don't retcon it - which is obviously not unheard of.
Edit - obviously is obviously obvious is obviously obviously obvious.