Justice League came out months ago, but fans are still finding new Easter eggs!

In one scene, The Flash makes a pose very much like Superman in 'The Dark Knight Returns.'

Justice League director Zack Snyder confirmed this shortly after the discovery.

But a 'Dark Knight Returns' tribute isn't too surprising, considering the influence Snyder had on the franchise.

It’s hard to have a Justice League without Superman.
Zack Snyder