I usually keep a couple of items on my wishlist, so I can purchase them later, when an interesting promotion comes along.
Last year Lego released The Lego Batman Movie and with it came a couple of excellent sets. I like how Lego portraits the dark knight with a lot of irony and the suitable outrageous The Lego Batman Movie designs.
Leading up to the start of the movie Lego released a couple of nice polybags. 30522 Batman in the Phantom Zone is centered around Batmans journey to the Phantom Zone.