So Celeborn is already Galadriel's husband and MIA or dead - as some of the show's critics have prophesized. So now the question: where is Celebrian?
I actually don't like that they brought up Celeborn this late in the season. On one hand, it helped to give Theo and Galadriel a bit of common ground, but on the other, now everyone who knows LotR (even those who only know Jackson's films) is expecting him to show back up, and I highly doubt that he's showing up this season. It just feels like the whole Sauron thing, everyone now starts a countdown to when he shows up, and the longer it takes, the more disappointed they will feel, until he does show up.
As for Celebrian: I'm inclined to say she's not born yet. Because if she is- and presumably being fostered somewhere- it would be extremely disappointing if Galadriel hasn't mentioned her even once. I know she hadn't mentioned Celeborn for 6 episodes, but she assumes he is dead, so it's reasonable she doesn't want to bring it up often.
And if she's not born yet, I am inclined to believe that we are not going down that road in the show. Mainly because Elrond is presumably thousands of years old, and if a child was born in season 2 and Elrond marries them in season 5, it could be a weird transition. Yes, that would be disappointing, but honestly, how much would it impact the show to not have Elrond get married and have a child? Yes, that is what happens, but does it really have any impact on the story as a whole, from here on out? Yes, it would be great for Elrond to have some familial stakes when the big wars kick off, but everything significant with Celebrian and Arwen happens in the Third Age.
For all we know she could be off at the Havens with Cirdan, but that would be disappointing on many levels for many reasons.
Worst case, IMO, is that they make Celebrian not be Galadriel and Celeborn's daughter.
I'm having a bit of a geographical crisis after the last episode. I know they're going to play a bit hard and fast with the map, but since they're actually showing the Harfoots traveling map, I feel it's worth bringing up.
Someone on Reddit put this map together showing the travels of the Harfoots (Harfeet?)
If the Harfoots have traveled all the way to the sea of Rhun (or nearby) and especially if the Grove is the cluster of trees on the northeast shore, how are they so near Greenwood the Great, when that's closer to where they started? The Grove could also realistically be anywhere east of the Sea of Rhun, but it's still quite a distance for Sadoc to be sending the Stranger.