I think it's to be expected. This is not a Thor spot; it's a spot for the movie "Thor" and I think that, because Loki is the favorite character of most of the people on here (including myself), it is not funny or weird that there is more Loki here than other characters; it makes sense.
I mean, don't get me wrong: I love Loki and Tom to death, but they both have their own spots. It's kind of annoying to come onto this spot and see another Loki/Tom spot.
I'm not surprised. Loki is one of those showy roles that most people tend to like. The fact that he's portrayed by a good looking actor helps. I guess.