I feel like I've asked about this before but it might have been in another group.
Re: "Crossovers are allowed, if the story premise is possible. Please submit crossovers under the fandom name the main POV character belongs to."
One, if the fandom already covers multiple shows, do we want to submit based on the general fandom (e.g. Arrow) or the specific show (e.g. Legends of Tomorrow)?
Two, for multi-deviation stories, is this rule on a chapter-by-chapter basis or does it depend on the entire story?
Case in point for both questions, I have a few fics with things like framing stories that take place in a different show (Flash versus Legends of Tomorrow, so same canon but potentially different folder depending on your answer to the first question) from the rest of the fic, and one that's a total alternate timeline to both shows and only touches official canon of both during the course of four chapters so far (out of thirteen and going).
And I have another one that technically takes place during Arrow and none of the other shows, but only because of the timing of the story--it happens to take place at the same time as the events of the Arrow episode in one of the earlier Flash/Arrow two-parters rather than the Flash episode of that same two-parter, even though my MC of choice has never canonically appeared on Arrow and was canonically absent from the Flash during that timeframe.
The POV character "belongs to" both Legends and Flash but has, as previously mentioned, never appeared in any of the other shows in that particular fandom.