Batman doesn’t show up in Superman, nor does anyone mention them – but there is a small Gotham City Easter egg.

In the middle of the battle between Lex Luthor and the Man of Steel, Superman finds time to tease the DCU's Batman.

Since Damian Wayne will already be Robin in Andy Muschietti's The Brave and the Bold, it's safe to say that Batman has been active in the DCU for several years. In fact, Batman has probably been a ...