Justice League: 18 Easter Eggs & References We Already Know

14. The Strongman

Also in the background of The Flash's hero den is a what appears to be a vintage display for a strong-man test of strength circus side-show (it's hard to make out but it reads "Try Your Strength".

It's an odd thing for a kid to have in his hero den, but it's another nod back to the comics - and specifically to the events of The Flash: Season Zero, in which he meets Mr Bliss and his circus of meta-human villains. The first he meets is Joey Rose, the circus strong man who leads him back to Central City Circus and Mr Bliss.

Hell of an obscure reference that, but that's what Snyder does.