There was no doubt Zack Snyder has a huge vision for Justice League movie and some of them he able complete.
In an interview on Justice Con YouTube channel, Justice League director Zack Snyder open that Wayne T. Carr actor was really cast as John Stewart for DCEU Justice League movies.
We already written about Green Lantern unused Concept Art for SnyderCut which is about months ago by concept artist Jojo Aguilar. But in that we can exactly see actor face but he's unknown for us that time.
But Zack officially confirmed it, he said:
“Yeah so Jojo [Aguilar] did that based on the actor that we used, who did the scen for us... A guy named Wayne T. Carr.”
after this, he continues describe briefly. He said:
“I told [Carr], "Look, there's a chance that this doesn't make it in the movie. We are shooting it in my driveway."... But yeah, he's amazing and I was talking to him the other day and... he loved the movie... and he was super excited for everyone and the reception the film has gotten.”
And when he asked about he met him and decided to cast Wayne as Green Lantern:
“Ray introduced me to him and said “You should check this. guy out, he's awesome. He's like this Shakespearean actor” and... I looked at a bunch of his clips. I just talked to him on the phone a bunch of times. We just talked about what [the role] might be...I mean look [Shakespearean acting] is not easy stuff and when you watch him do it, I was like, okay this guy can clearly handle what I have in store for him. He did a great job.”
So, Green Lantern originally set to debut in DCEU Justice League with #SnyderCut but as some reason we missed in movie. As movie was supposed to feature John Stewart Green Lantern's but we got Harry Lennix’s Martian Manhunter appearance.