There ' s a reason the storytellers are so adamant that the Valeyard is not and never was a future Doctor unlike many theoryspinners keep claiming , and that ' s because if we know what the Doctor is like in the future , eventually the storytellers have to tell that story to make it fitNot in the Doctor ' s future ? Sure . Never was in the Doctor ' s future ? Hold up , now . Of course he was . We saw him . Just like we saw the TARDIS about to explode before the Doctor threw himself a big friendly button . Past , present , future . Whatever . It can all be rewritten on a whim . Nothing has to fit . Ever . This is maybe the one franchise where it ' s literally impossible to tie the hands of the storytellers . And thank goodness for that ! D