So while we were shooting Justice League, they shot Ezra off to the side, the ‘no honor amongst thieves’ thing in capturing Boomerang.
All that Speed Force stuff was stuff we developed during Justice League.
But again, that got an accelerated kick start when we were shooting Justice League, because they had decided they wanted to put the Ezra Miller cameo in Suicide Squad.
We had the benefit of having something way back then, that we developed further throughout Justice League, and then got to revisit it again when we got to do Justice League for Zack.