You should probably be at least a little bit familiar with it? There are many minor plot elements that derive from some of the more obscure comics or from recent events in the comics. I think the story was fun even not having seen all of the particular things that are being referenced, but there's certainly a great deal of DC-specific characters, and you'll probably enjoy it more being familiar with them.
This is the monthly thread for posting media of various types that you've found that you enjoy. Post what you're reading, listening to, watching, and your opinion of it. Post recommendations to blogs. Post whatever media you feel like discussing! To see previous recommendations, check out the older threads.
Rules: