The Flash movie: 26 DC Easter Eggs and what they mean

21. Cesar Romero’s Joker

Taking a stride alongside Adam West’s Batman is none other than Cesar Romero’s iconic Joker. Though his appearance is not as prominent as some of our superhero celebs like Christopher Reeve, Helen Slater, or Nicolas Cage in The Flash, Romero’s unique rendition from the vintage ’60s Batman series does get its moment in the multiverse spotlight.

It’s hard to imagine Batman without his most notorious nemesis, and The Flash tilts its cap to Romero, one of the original actors to bring to life the notorious Joker, delighting audiences with this delightful tribute.

22. Lewis Wilson’s Batman

Tying together the series of Batman cameos in the dynamic Speed Force sequence is none other than the portrayal by Lewis Wilson. Wilson holds the distinction of being the trailblazer who first brought Batman to life on the silver screen, way back in the 1943 film serial Batman.