Having been involved in a couple of websites, I can tell you it's important to have a keen interest in your subject from the beginning. Otherwise it'll soon overwhelm and/or bore you and you'll move on. So whatever you do, make sure it's something you care about.
For my own Superman site (
http://nightwing.supermanfan.net, hosted by our own Great Rao!), I chose to focus on the Superman of my youth, and my experiences and memories of being his fan. Since it's all personal, it's no chore to put in the time needed to create the pages, and since it needn't be timely or up-to-the-minute, I can add to it...or not...depending on my mood and free time.
Running a "news only" site has the benefit of not forcing you to write or design tons of new content (you'd just point to things that exist elsewhere) but it will also mean making a commitment to stay on top of stuff all the time and constantly update. Trust me, this is more work than it sounds like. But if want to get visitors following this kind of format, they'll be looking to you to do their legwork for them; find Superman-related news stories before they do, and dependably, and they'll keep coming back.
Just keep in mind there are as many ways to do a Superman site as there are Superman fans. The great part about my site is that it's all told in my voice from my point of view. I'm not competing with anyone to tell the news first, to get the hot interviews or to be the authority on Superman history. I'm just sharing my own thoughts. And happily, that approach has put me in touch with lots of fans who have their own memories to share.
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