This week's Detective Comics #1008 by Peter J. Tomasi and Doug Mahnke may have revealed one of them as not-secret Bruce Springsteen fans.

The title of the story is "Greetings From Gotham" is a reference to "Greetings From Asbury Park", Bruce Springsteen's first album, and it has the Joker challenging Batman to come to their favourite amusement park by the sea, which resembles the real Asbury Park.

The Joker holds the park goers and vendors hostage with joker venom releasing necklaces shaped like "TILLY". Tilly is the name of a painting of a clown face that used to be on the side of an old amusement building in Asbury Park that was fought to be saved and is still there.

Batman finally appears and poses in front of a painting of Tilly on a wall in the same color scheme as it was in Asbury Park.

One of the rides they go on is the "Tunnel of Love', a reference again to Springsteen of his "Tunnel of Love" album.

And Batman's fortune card later reads "Hearts of Fire Grow Cold". A line From the Bruce Springsteen song "No Surrender".

Any more for any more?

UPDATE:

Chris writes in the comments;

"Don't believe half of what you see and none of what you hear" in the epilogue is a line from the song Magic

DETECTIVE COMICS #1008 YOTV THE OFFER (W) Peter J. Tomasi (A/CA) Doug Mahnke, Jaime Mendoza

The Joker returns to Gotham City! The Joker is through working with the Legion of Doom, and he wants to get back to his roots: giving Batman absolute hell! The Clown Prince of Crime comes back with a bang-and he's not about to take prisoners! As if that weren't enough, Lex Luthor delivers the cure for Mr. Freeze's beloved wife, Nora, freeing her from cryo-stasis at last! But something else is very, very wrong with Nora…

In Shops: Jul 24, 2019 SRP: $3.99