[Marsh.]

I like Kris Marshall, but I feel like his type of Doctor we've already seen enough of. He's a safe choice.

Like Capaldi was a risky choice in the new era where the Doctors are all young, I want them to take a risk again and try something different.

But I wouldn't be surprised if the new Doctor has already been chosen. Moffat said this regeneration would be slightly different.

Given the fact that we're going to see Simm's Master and his future incarnation Missy together, I wouldn't be surprised if the current Doctor also has scenes with his next incarnation.