Argo City is mentioned. Argo City was the home of Supergirl in the comics and the 1984 Supergirl movie.
Based on "For the Man Who Has Everything" from Superman Annual #11, published in 1985. The Black Mercy has reappeared a few times since then, most recently in a Green Lantern story.
Batman: A little sharp on the turn, don't you think?
Wonder Woman: Sorry if I scared you.
Batman: What'd you get him?
Wonder Woman: I'm not saying anything (whispering) He'll hear, and spoil the surprise.
Batman: He can hear that, too.
Wonder Woman: How about you?
Batman: He's not the easiest person to buy birthday presents for.
Wonder Woman: Bruce... you didn't get him a gift certificate?
Batman: No... cash.
Mongul: You recognize me! I'm flattered. I suppose Superman told you all about our previous encounter.
Batman: You mean how he humiliated you?
Mongul: A... jaundiced account.
Mongul: The Black Mercy is a telepathic species. It reads the heart's desire and feeds the individual a totally convincing simulation.
Batman: So he's dreaming.
Mongul: Oh, far deeper than any dream. I wonder where he thinks he is. Sitting on a throne, ruling the universe. All you human garbage fawning at his feet. More honest, don't you think? Than this pretense of being a selfless hero?
Mongul: How nice of you to volunteer... to be the first of your race to die.
Mongul: Oh dear, is that a neuro-impactor? I didn't know they were still making those. I'd advise you to try the plasma disruptor. It's more of a woman's weapon.
Superman: Do you have any idea what you did to me?!
Mongul: I fashioned a prison that you couldn't leave without sacrificing your heart's desire. It must have been like tearing off your own arm.
Mongul: Happy birthday, Kryptonian. I give you oblivion.
Mongul: You know for a moment there I almost believed you were going to kill me. How stupid of you to hesitate like that. Not a mistake I'll make, I can assure you.