Akira was, obviously, the launch off point for Anime in the west, and the movie was great. But later on I read the Manga, and they were so much richer than the movie. It seems like a 12-episode Anime would be perfect for Akira. And it would probably be successful, because everybody knows/loves it.

20th Century Boys is a bit... odder. I've read the Manga twice, and I know that there's a live action film, but the work seems so much better suited to Anime. I don't know how it's held up -- certainly no one on KIA2 mentions it. It's also not great -- the build up is fantastic, but the denouement is... odd.

Just wondering if there's a reason for this, or if it's just an historical quirk.