So the new image of Batman is released and this comes shortly after the Deathstroke teaser footage. The debate was if Deathstroke was in Justice League or doing test footage for the Batman solo. I always thought it was strange to built a big set piece for some Deathstroke test footage. But take a closer look at the support beams in both photos.

Single dot opening, long opening, single dot opening. The shape, they angle off towards the top. Also we see Batman next to the Batmobile and we can catch a glimpse of it behind Deathstroke in the gif too. These are from the same set.(possibly even the same scene?!)

I’m putting my money down for Deathstroke in Justice League. He has somehow infiltrated this section where Batman keeps the Batmobile