I've never understood putting anime on in early morning timeslots. The audience is the most minimal you can possibly make it. Anime is niche, but most people who want to see anime buy it on DVD already. And then you put it on at 5am and expect people to watch it.
Mind you, it is Metropolis which is pretty distinctly average IMO. Tezuka's style isn't the most endearing, and I'm no fan of CGI, especially when it's nothing too incredible in the movie. The plot and the characters are dull too. Worth recording, but not the money I got it for.