No, Christopher Walken is not in that movie (and more's the pity), but the actor who plays Zod (a.k.a. "the bady guy") bares a slight resemblance, and I mentioned to Jon during the movie that Walken would have been a much better Zod.
Jon then starts quoting Zod's lines from the movies, a la Christopher Walken. I had no idea he did a Walken impersonation, and it made me laugh so hard.
Jon endlessly surprises me with little tricks like that. I absolutely love it.
I also love that he cleans the litter box.