"Dynamic Duo" is made with a combination of computer animation, models and large-scale puppetry; the way the characters move and their faces on those characters is genuinely unlike anything you've ever seen before. And the Gotham City that the Swaybox team has assembled, by their own admission, is more expansive than any put on film before. You might have watched Swaybox's test on a puppet of Hogarth from "The Iron Giant," which was genuinely mind-blowing. But seeing that technology on the scale of a feature-length animated project set in the world of Batman? Truly unstoppable.
The closest analogy is seeing what Christopher Miller, Phil Lord and their entire team were doing on "Spider-Man: Into the Spider-Verse" for the first time, both in how cutting-edge the visuals were but also in the way that it was able to translate characters that you know almost on a molecular level and do something wholly unique and unexpected with them.