Ooof. I forgot about the medallion. Of course, as stated by king of nowhere, it could come from other sources. Getting into some spoiler territory maybe? We see most of the Trakand family in the teaser, but now sighting of Morgase. So, it will be interesting to see how they weave them all in for this season.

Based on the teaser, I don't think we will get the doorways at all. Matt already has his Hero of the Horn memories form season 2 finale. He might find a way to have the knife forged into a more proper ashendarei. Then, he is set. What else does he get from the doorway? It looks like Moiraine will get her visions while in Rhuidean, but I would be surprised if it was through a doorway with the finn. The Accepted testing already shows some terangreal give visions. She will just get those with no need for adding the finn to the story. It would take up too much screen time and vfx budget for either of them to spend any time in there.

Rand didn't carry Moiraine out of Rhuidean. Rand and Matt climbed the cliffs of Chaendaer back to the camp. They were trying to get there before the sun finished rising to avoid the heat. They were confronted by Couladin at the edge of the camp. They arrived at the camp at dawn but left the city before dawn. So, I am not sure why you are expecting them to show Rand carrying Moiraine out of the city. Non-book readers would have no clue why he is walking out of a fog and book readers would exclaim that it doesn't fit the book. The poster at least gives a reference to the teaser opening and vice versa. We probably won't get the poster or some of the scenes from the teaser in the show. Look at the eye catching pool scene with Eggy from season 1 trailer. In the show? Nope.