I just saw this in 4K (not DV!) and I too thought that the picture was PERFECT! However, I thought that the sound was near perfect as well since the surrounds were used a lot and the sound was one of the more leveled movies I have watch - save for the loud music! I wished more movies would have a more leveled sound field, or at least make sure that the main dialog is loud and up front.
The movie itself was great as well! Even though we know what it's about, you are still watching a serious drama about a silly comic book character, and it works like one of those serious drama of the 70's! I still cannot get over how DC's characters seem feasible when given a credible origin story. I still don't know why it works when their characters are silly.