The dev team has been working on 11.0 for quite some time, Alpha release was a while ago and Beta release was just this week… that means the story, game mechanics, and other systems are likely finished and they are just working on “tuning” throughout the Beta period up until (and through) pre-patch.
The story for 11.1 and 11.2 is also hopefully solidified by now as well… nothing worse than pulling “a Star Wars sequel trilogy” without a least a storyboard defining intro, middle, and conclusion. Whether it’s cosmic or not, it’s probably already set.
Edit: Disregard. Just realized you said 11 (Expansion After DF) and not 10 (Dragonflight).