I'm assuming the official series page will still come; so can you move/give a link to all relevant subjects and characters over there, and remove the Riftwalkers category when you're done? Or well, rather make it obsolete by deleting the category from all pages?
As stated in the list of Wiki rules no one reads, these kind of specific categories are not allowed, as they should be sections anyone can add to. I imaging you wouldn't want strangers to add their pages to Riftwalkers and all.
Other than that, keep it up, you're a hard worker.