For example, the Federation's founding members (Tellarites, Andorians, Vulcans, Humans) were the subject of fan theories and "fanon" for many years before the ENT writers made it official. One of the interesting (and fun) aspects of this recent wave of series has been seeing the writers increasingly add nods to fan theories and pieces of fanon lore over the years. What are some good examples of this?
And relatedly: what's a fan theory, or piece of fanon, that you suspect the current writers believe, even if they haven't explicitly stated it on-screen?
I'm really happy they included Cetacean Ops in LD. I'd love to see more of them.
I also adore that we got to see it, but technically it was already canon - it was mentioned in the alternate universe bridge chatter in TNG: “Yesterday’s Enterprise” and Geordi asked if Briam “had a chance to see the dolphins yet”.