The fact that the reshoots for Justice League were handled by an entirely different director has fans certainly curious how the film might change before it reaches screens. It turns out at least one character did go through some changes. Joe Morton, who plays the father (and also the creator) of Victor Stone/Cyborg says he was involved in the reshoots of Justice League that were helmed by Joss Whedon and while Morton was only a small part of the reshoots, he says that Cyborg was a significant part of them, as actor Ray Fisher filmed new scenes designed to lighten the tone of his character. According to Morton...
I know that with Ray [Fisher], the young man who plays Victor, there were some adjustments that they made in terms of the tone of that character. I think what I heard was that there was a need from the studio to lighten up the film in a way, that the film felt too dark. I don't know what that meant in terms of how it actually got translated in terms of the reshoots but that's what I heard. That's what I thought some of the reshoots were about.
Hearing that the Justice League reshoots may have been focused toward lightening the tone of the film is both unsurprising and a little bit shocking. On the one hand, the idea that Justice League, in its original form, had a darker tone makes perfect sense. Zack Snyder's previous DC films have both been on the darker side so it would make sense for the new one to follow suit. The tone has been one place where many have been hyper critical of the DCEU and studios certainly hear this and often they'll respond if they think that's the best way to make a follow-up film successful. The thing is, Batman v Superman: Dawn of Justice made Scrooge McDuck levels of money. It actually is a bit surprising if the studio has decided to make this shift in tone simply because it adds an element of uncertainty to the final product.
Of course, just because there may have been a decision to lighten up Cyborg, as Joe Morton tells IGN, it doesn't mean the entire movie will be lighter. Cyborg is a character who can be changed without making too many waves if only because he has yet to actually be introduced to the DCEU beyond a brief teaser. If Batman somehow had his toned lightened it would be weird, but they may have decided that they needed the members of the Justice League to balance each other better, and that Cyborg was a bit too dark in his original incarnation.
Of course, without seeing the reshoots we have no idea exactly what is meant by a "lighter" Cyborg. Will he be cracking jokes or simply not acting completely depressed? We'll find out when Justice League arrives this November.