Long before Justice League hit theaters nearly two years ago, the True Blood actor found himself attached to play the DC villain – whose real name is Slade Wilson – in a standalone Batman flick, which at the time was set to be directed by and star Ben Affleck. Fan reaction to the casting was through the roof, and it wasn’t long before Godzilla director Gareth Edwards was brought on to flesh out a Deathstroke standalone film.
Then Justice League happened. While Manganiello’s take on the character officially debuted in its post-credits scene, the movie was nothing short of disastrous. WB reconsidered its entire approach to the DC Extended Universe, leading Ben Affleck to step away from directing The Batman before eventually hanging up the cowl on the character for good.