I wish Moffat hadn't said that he really loved Superman, because now I know I'm going to watch this and compare it mentally to, say, Lois & Clark. And if I do that, based on the released clip, I'm going to be disappointed; there was more energy, more style, and more verve in an episode of Lois & Clark than there was in that clip. And Lois & Clark was twenty-plus years ago!
Well, no matter how good or lame the superhero in the special is, Capaldi alone makes the special a thousand times better then anything Lois & Clark ever did. To be fair, I consider Lois & Clark the worst TV incarnation of Superman, and the second worst live action incarnation after the Zach Snyder stuff, so being better then that show is a low bar for me. But, regardless of that opinion, Capaldi is awesome and Doctor Who in general is awesome, and I honestly don't think it will be that similar to a romantic comedy sitcom from the 90s, plus it will probably have a much bigger focus on the superhero. If it has similarities to superman, I seriously doubt it will take anything from the sitcom, and just be similar to the character in general.
That said, if the superhero does have a "Castle of Loneliness", then this special is automatically better then about half of the previous Doctor Who Christmas Specials
