>>103024465>>103024667It's from Injustice, I think. And yeah, that's what happened: Billy, acting on Superman's orders, beat Black Adam and, after knocking him out, changed his magic word. Black Adam wandered the Earth as a powerless homeless person for a while, constantly trying to figure out what his word is, and is about to give up when the scene in the OP happens.
It's probably one of the first instances of Injustice becoming the terrific walking shitpost it is now.