It reminds me a lot of the Tom Baker regeneration. He was dark and mysterious in the beginning if I recall correctly. It feels like they wanted to do him homage with this, and the older doctors in general. They even threw in a long scarf reference. As to the episode itself, the entire episode felt more like a defense of their decision to bring in an older doctor than an entertaining story. Trivial, but I did not like the new intro. I thought it was, cheesy.