Justice League: 29 Easter Eggs & References You Need To See

5. Crispus Allen

When Commissioner Gordon is speaking with a detective at Gotham PD about Batman's questionable recent behaviour, he speaks defensively of the Caped Crusader, which seems to be the sole purpose of the scene, to re-establish the firm bond between these characters.

However, there is a cool little extra for comic book fans to catch: the detective talking to Gordon, played by Kobna Holdbrook-Smith, is listed in the film's credits as Detective Crispus Allen, who has been a frequent player in Batman comics over the last two decades.

Though there's sadly no outward indication during his brief cameo that the character is in fact Allen, it's still fun that his identity is confirmed for sure in the closing credits.