Canon refers to the source material that makes up the DC Extended Universe.
Canonical material comes in several mediums, however some have more primacy over others. Listed below is the order in which these take precedence. Additionally, should any newer film material contradict an older film, the newer one shall take precedence.
Films
Information from the films in the DC Extended Universe are the highest precedented canonical material. The following material from them also has a line of priority:
- Dialogue
- On-screen text
- Deleted scenes
It should be noted that, following along with the newer filmic material superseding older filmic material, as well as a general consensus, Zack Snyder's Justice League is treated as higher canon than Justice League, and so anything contradictory subscribes to the idea that the former is the proper canon.
Comics
Tie-in comics and comic books that are set in the DC Extended Universe are considered canon and their contents to be included on the condition they are sourced.
Books
Sometimes novelizations and other books have expanded information that was cut from the film.
Video games
Tie-in video games that are set in the DC Extended Universe are considered canon and their contents may be included.
Online marketing
Marketing websites (example here) and other viral sites containing canonical material are welcomed. A hyperlinked citation is required for this.
Merchandise
Merchandise for media will often be released by companies to tie in with the release. These will occasionally reveal small details or names in conjunction with this, be it in product names or otherwise. A hyperlinked citation should be used here to source the detail.
Interviews
Film crew/cast will often give insight (eg. press statements, DVD commentary) that offer insight into plot details that were never revealed elsewhere. This is appropriate to add to the wiki on condition that a linked source be cited.