Suicide Squad

Here is another interesting possibility "“ what if Deathstroke is presented in the Justice League movie as a new member of the Suicide Squad? We already know that Amanda Waller and Batman aren't exactly besties. However, given the impending alien invasion, Waller and Bruce Wayne might want to work together.

So here comes Deathstroke. Unlike other members of the Squad (members we saw this year), Deathstroke is actually superpowerful and he does stand a chance against Steppenwolf and the Parademons. Even more, maybe we have already met him.

It wouldn't be such a big surprise for me if GQ actually survived and he entered a super-soldier program. Justice League would be perfect to introduce this new Deathstroke and reveal that Scott Eastwood's character was never called Edwards.