Deathstroke won't appear in the Justice League

Maybe the fact that Ben Affleck did the reveal and not Zack Snyder is a hint in itself. While there are a few possibilities on this list that would make sense, Deathstroke should be the highlight of a movie and not just a secondary character.
So maybe Ben Affleck has already started working on The Batman. And maybe this was his way of teasing the big news. There is a precedent to this "“ remember when Zack Snyder revealed Jason Momoa's Aquaman, as if the superhero had a big role in Batman v Superman: Dawn of Justice?
This also explains, to a certain degree, the Flying Fox. Even if it is a Justice League property, we all know who built and actually owns it. And it also makes sense from another perspective. Ben Affleck, as a director, would want to know how the big baddie of The Batman looks on the set. And since the Flying Fox was already built for Justice League, the opportunity was for the taking.
And lastly"¦
