Another Easter Egg hidden in Batman's trophy room in the Batcave, and a nod to another super-selling Batman series. If you head to the right of the TV set for the 1966 Batman show, there's a cracked wall that can be smashed down using one of the stronger members of the playable cast (like Killer Croc, Lex Luthor or Cyborg in large form or Solomon Grundy). Breaking that wall down will reveal a familiar looking glowing green Riddler trophy - an obvious nod to the Arkham video game franchise. There's also another Easter Egg related to the same area, and indeed the same villain. If you play as The Riddler in Batman's Trophy Room, an alarm will sound "Intruder Alert! Intruder Alert!" referencing the sequence in Batman Forever when Jim Carrey's Riddler destroys the Batcave.
