Justice League: 10 Ways Deathstroke Could Appear In The DCEU

While the assumption with Justice League is that the team will be uniting against a cosmic threat, there's nothing to suggest things won't be a little bit grounded for at least some of the runtime. While Steppenwolf is the gang's big bad, it's possible that Batman could have his own concurrent subplot involving Deathstroke, which would serve as a perfect opportunity for some Arkham-esque action.

It seems odd from a story perspective, but having Bruce dealing with both extraterrestrial threats alongside his usual beat work would further distinguish Affleck's Batman from the previous screen Dark Knights, while also providing be a nice way to get the full scope of the DCEU world into the film.

However, I'd say this is oddly unlikely given that Batman's primary objective in the film appears to be the actual forming of the League; the Gotham crime would seem just too minor and it would likely better fit for another member (Flash?) to be still dealing with homegrown problems.