It’s still a little over five and a half months away, so any unfinished CGI will be complete by the time it releases. James Gunn movies are pretty good about that because he gives the VFX artists the required time they need to make it the best it can be, and he also uses a lot of sets where he can so they aren’t overburdened. And unlike Marvel Studios, at least before the restructuring, Gunn treats the animators very well and always praises their tremendous work ethic and craft. I mean, just look at all of the amazing stuff Framestore did in GOTG, Vol. 3 with all of the CGI creatures, compared to a lot of the MCU’s other output around which suffered a lot from being rushed out and unfinished:
I am actually surprised that Superman looks as good as it does this far out. In the trailers for some of this movies, there’s at least just a tiny bit of jank that gets worked out just in time for the final cut, but everything that we’ve seen so far already looks pretty solid. It seems like not having to adhere to MCU time has given him even more of an ability to work at his own pace.
I really can’t wait for this!