Just as the classic DC theme tunes appeared in the second LEGO Batman (when Superman took to the sky), there's a similar trick in LEGo Batman 3. When Superman takes off in this sequel, his theme tune plays once more, and Wonder Woman gets the same treatment, as her classic TV theme is played. There's also another level to this, as if you leave the character selection screen inactive for a certain amount of time with the cursor hovering over certain characters (for around 4 or 5 seconds), they will start to sing the classic Batman theme... https://www.youtube.com/watch?v=Tyg7ZSNpJuU
