I enjoyed it, Capaldi is a great doctor and I like his suit. The references to past events was nice, and it was a bit sad that this doctor doesn't even remember things that were important to previous Doctors. Interestingly it seems to suggest that the Doctor subconsciously chooses his appearances, the way the Doctor talks about seeing his face before and it would tie in nicely with another Timelord.
Where's Batman - The Superman of Planet-X which sees the appearance of The Batman of Zur-En-Arrh. Or Make Way for Wingman with Paranoid Robin and one of the most unintentional funny lines of all, especially given what was going on at the time. And how could you not include The Legend of the batman, who is he and how he came to be? which Bob Kane and Bill Finger told Batman's whole origin in two pages.