Cameo of Endless in other works

Hey, I was wondering, if Endless show up in any way or form as cameo somewhere else? Could you give me some examples? Outside of DC, you know, like in a game, show whatever, I would like to know them.

(On the side note, I don't know if it is just me but why posts disappear? I saw two new one yesterday and they are gone? Is something happening here I don't know about?)