Warner Bros makes U-turn: Henry Cavill to not play Superman, confirms British actor. See what happened

"After being told by the studio to announce my return back in October, prior to their hire, this news isn't the easiest, but that's life."

James Gunn Writing New ‘Superman’ Film; Henry Cavill Will Not Return, but Eyed to Play Different DC Character

Changing their mind. Henry Cavill will no longer portray Superman in the DC movie universe — despite previously announcing that he’d be returning to the role. 

I wanted to make it official, that I am back as Superman." The Black Adam cameo was "just a very small taste of things to come", he added.