I feel like we should make pages for uncredited extras, since some stunt performers were listed in the uncredited casts of some movies, and that some actors who were in the upcoming films have also appeared in other past DCEU films.
Firstly, in regards to uncredited actors, unless you can find a credible source that proves that they're in any of the films, then you might as well just be adding any old actor; IMDb is not a credible source, as anyone can add info there. If you can, of course, by all means, create the page and source them.
Secondly, we have no confirmation that The Batman is out of the DCEU; it certainly appears that way, but as has been pointed out time and again, the last semblance of confirmation we had confirmed that it was in the DCEU.
If I could make a suggestion, all of the content related to The Batman should be removed from the wiki. It's pretty obvious that it's a reboot and not part of the DCEU, since Jeffrey Wright is black and J.K. Simmons is white.
"Pretty obvious" is all well and good, but the last confirmation we've had was that it was. For all we know, they're mass retcons, so unless we get any confirmation at all, we have to run with what info we have, continuity be damned, that's how a wiki works.
Okay, thanks for updating the uncredited cast list for Batman v Superman, but the credited list I listed was based on the end credits for both theatrical and Ultimate Editions, the list you received from IMDB was uncomplete.