As you have seen my wiki before, you know it’s still a WIP, if you can please help with a watermark, page setup, categories and articles, tell me. I know your busy with other wikis so I understand. All my wiki needs is a boost.
Just a heads-up that you posted this message on your own wall, not mine.
As said in a previous question you asked me, that's called a wordmark. You add an image there from the Theme Designer.
I know absolutely nothing about the wiki's topic, and hardly watch TV/movies ever, so I don't have much advice to give regarding how you should design the layout for pages/categories/articles. I recommend just looking at other TV/movie wiki communities, although I assume that you'd at least include character biographies and episode plots.
I also assume that most other communities would include both any TV series and any movies.