Sometimes the time travel confuse me, in this case, the new Borg queen pretend to create a new collective, now, the third season Borg queen is the old one, right?
So, what happend with one and the other collective? The new one affected the other one?
Edit: I add an spoiler warning in the title.


We are all confused. I feel they wrote themselves into a corner in PIC S2 and airlifted out of it without addressing the little unpainted corner they left behind. From a writers’ room perspective, it keeps their options open. From a fan POV it’s maddening. I don’t think it’s all that clear that the OG Borgs are dead after S3; they could return as well because they caused a subharmonic regression in the 500 Cochrane range that traveled back a transwarp corridor in time. Or something like that.
This is a Klingon makeup problem. For the longest time, it wasn’t addressed why the movie Klingons looked different from the TOS ones. Then ENT tried to fix this. And then DISCO came in and completely obliterated that fix. It doesn’t make sense. It cannot make sense. We mustn’t be so Vulcan about it.
Technically there was a throwaway comment in DS9 before the Enterprise episodes. I only mention it because they basically took the lines from that episode and combined them all into one story.
Trouble with Tribbles! Worf just says they don’t discuss it with outsiders. ENT does more of the heavy lifting if you ask me.
Odo (and I think someone else) do suggest reasons, like a virus or genetic engineering.
How did Enterprise plot out the changes?
Mind you, I’m not trying to imply that Enterprise didn’t have a unique and interesting storyline all its own. I think it did, but they absolutely followed in the footsteps of DS9s own homage.
I think, in the Enterprise episodes, they implied that only a small population of Klingons underwent that change. So there would still be Klingons who appear as they did in TNG (and the movies) and beyond while allowing for the more human appearance of those in TOS. I dont know about Discovery, as I’ve not watched it, though.