Howling:The Doctor's Face

In the scene where the new Doctor meets Pigbin Josh's grandfather he mentions how he recognises his face and hints that he may have subconciously chosen it for a reason. Assuming he never met John Frobisher, he's probably thinking of his encounter with That Roman Guy Who I've Forgotten The Name Of. So the question is...why that face?
 * Could it be a way of warning himself that danger is coming, what with 'Volcano Day' in the Pompeii episode?
 * Could it indicate that soon he'll have to make a terrible choice, like he did when he went to Pompeii?
 * Could it be something to do with the Doctor's family? The roman guy had a family, I guess...
 * Or, maybe the Doctor did meet John Frobisher at some point, and his choice of the face is to remind him of times when he's turned his back on the world like he did during the 456 incident? 213.249.213.20talk to me 13:48, August 24, 2014 (UTC)