I'd say I'm sorry to keep harping on this but I'm really not, but I just don't see the appeal in being mad, from the perspective of someone creating transformative works, that you got more material, even if it might contradict what you were working on.
I have notes and even some semi-finished chapters for a post-Campaign 2 Mighty Nein fic set in Molaesmyr. I initially envisioned it as taking place no more than a couple years after the end of the campaign (ie, before 843 PD), with Caduceus, Fjord, Jester, Essek, Calliope, and Reani looking for the source of the corruption and perhaps finding a way to stop it.
Obviously, this doesn't fit with the canon of Campaign 3. So here are my options:
Keep writing it as originally planned. I'm not obligated to stick to canon if I don't want to; AUs and canon divergences are very real things. I happen to personally prefer either canon-compliance or very specific and deliberate choices to diverge from canon and explore the what-ifs of that choice, but this is a completely valid path forward.
Move the time to, say, 845 PD, post-Campaign 3 (presumed, anyway). What do these characters look like ten years later? What's driving them to pursue this now? How did the events of the Apogee Solstice impact them? Is that why they're going here? Can I incorporate the cool new information we've gotten about Uthodurn and Molaesmyr and perhaps say something new? What does it mean to them that they go to Molaesmyr and find Ludinus's tower burned?
Keep writing as originally planned, but now I know they don't stop it in the late 830s. Why don't they stop it? Are they unsuccessful? Will it take too long? Do they need to return to the similar corruption in Aeor? Maybe they're actually there in 843 PD and they get teleported by the solstice just before they find the answer, and that's a pretty hefty addition to the story. Or maybe they simply fail, or realize they're unprepared and will plan to try again, and that's a story too.
Radically change the story. Maybe it's just Caduceus and Calliope going there, and it's a scouting mission, and they know they won't be able to stop it, and they just want to understand it. Maybe that's the setup for the story I could then tell with option 2 or 3.
As myself what broader thing I wished to do with the story in the first place, and write something entirely different but which still achieves the same goal. Did I just want to explore Molaesmyr? I could write some deleted scenes about Team Wildemount, or write something in which they return. Did I want to write about Caduceus's walkabouts and his relationship with Calliope? I can have them go somewhere else.
Throw a tantrum that I learned more about a location that intrigued me and blame the canon that inspired me to write in the first place for not matching my exact personal vision.
And it's truly bizarre how common it is that people look at their equivalents of this list, and then jump straight to option 6.
