Our current "most wanted" is more fleshed-out articles for individual manga chapters and anime episodes. If you'd like to contribute, here are the category catalogs:
These pages are named after just the official English title, no numbers (i.e. "The Birth of Astro Boy", not "Episode 1: The Birth of Astro Boy"). The exception is if an episode is part of a series (i.e. "The Greatest Robot in the World, part 2").
If a particular episode or chapter isn't up yet, feel free to use the Special:CreatePage to make it.
We also need help with certain pages that already exist, but need to be expanded:
Finally, here is a list of pages that have been linked to elsewhere on the wiki, but have yet to be created and written. Clicking on one will bring you to a pre-named new page editor.