^That would certainly make sense. This is a very brave move anyway, changing the entire canon of the series and messing with the story of Matt Smith's Doctor.
I'm not sure about this season, I feel like it was better than last time but Chibnall still missed the mark more than he hit it. For example, I can't believe there was a story that involved fleeing into a tunnel, just like in the last season. I still didn't like his version of The Master, played by Sacha Dhawan.
Speaking of Dhawan, I also found while randomly looking back at episodes of The Deep that he was in that too and looking much younger. At least until he had a big dose of radiation, anyway.