It’s great.

This looks amazing.

I am a big fan of practical effects, but Metamorpho is not doing it for me. This is a time I would prefer a CGI character, provided the time and money was put into it. I would have like a gaseous head rather than the swirls.

What's really curious about this featurette is that it's more about James Gunn than about Superman. It's like DC is selling the movie as an auteur-driven movie instead of a traditional big franchise movie.