Huge bump because this thread came up in ATT
. While the OP of this thread hasn't been active in 2-3 years, this discussion may be relevant to the topic of the ATT—that of what to do with Film.Dark Universe.
We have two whole indexes of cancelled works. I think the general consensus was that there should be enough of a work to trope it in some way.
For example, something like Justice League: Mortal is okay, because we have a full script to work off of. Even though it was never filmed, we know exactly how the story plays out and can list tropes accordingly. Meanwhile, something like the recently cancelled Batgirl movie had it's page cut because we had practically nothing on the film. No clips, no trailers, not even a script to work off of.

I asked this in ATT
a few days ago, but after 30+ replies it was noted that the discussion should be moved to the forums.
Can cancelled works have pages if they have enough tropes to not be a stub? "Cancelled" as in they've never been released, most likely will never be released, probably didn't finish development, and have never been leaked online in full (or had a script posted). We're not talking about Star Fox 2 or Thrill Kill, which have complete or near-complete builds circulating despite no official release.
Castlevania: Resurrection has a page despite being cancelled nearly twenty years ago. No build of the game has been released, afaik. Sly Cooper and The Governator also have pages despite both being cancelled years ago.
From what I know, it's against the rules to trope What Could Have Been examples. That means deleted scenes, Cut Songs, developmental elements, etc. But most cancelled works seem even less reliable than something like a deleted scene, which is usually released officially.