Originally Posted by
sandydune:
“The new series needs to come back with a something? The Doctor needs to have some kind of authority, South park style
The Doctor has been working up to something, meeting River again? meeting The Master? Meeting another Doctor? Challenge? Doctor needs a challenge
Sorry, just something out of nothing.
”
BIB: Yes, he does need a challenge. But he's become so powerful there's not much that can challenge him now.
Matt Smith had not one but two -- yes, count 'em -- two stories where the universe had already been destroyed and the Doctor never existed, and his companion saved them by doing magical timey-wimey stuff.
If not even the destruction of the universe can challenge the Doctor any more, it's hard to imagine what can. That's why Capaldi's first season focussed so much on "Am I a good man?" Moral challenges are the only ones left for him now.
Some of us did some brainstorming about this on another forum. And we all came to the conclusion is that the show needs a season-long story arc about the Doctor being trapped in a totally alien universe. He could be sent there as part of a trap set by Missy or Davros or whoever the season's big bad is.
The Doctor's knowledge wouldn't help him there, and the TARDIS might not even work properly (cf. Rise of the Cybermen). He'd have trouble just finding out where he is and what's happening, never mind finding a way to return in time to stop Missy/Davros/whoever's evil plan in the season finale.