I have a small theory that in the world of Konstant, in addition to the atrium, there is another portal. I think that this time we have to build a portal, instead of going through the maze. If you remember, after winning the king of crabs, we can catch a very interesting thing that called "the Celestial Tribute". Perhaps he is the beginning of the puzzle. Confirmation of this is Warly's quote on Celestial Tribute, "Somethink tells me this is part of bigger recipe". In addition to the fact that this altar promises to tell secrets to each character, it promises Warly to take him to his maman. Warly quote on moon altar: "You know how to get me home to maman?". The appearance of the lunar portal in the game also explains that only 6 characters went to the altar instead of 14. In the trailer for "Don't Starve Together: Return of Them - Turn Of Tides" we can see that Wilson, Wigfrid and Winona are sent to the moon island, but in the trailer for "Don't Starve Together: Return of Them - Salty Dog" from the moon island only Wigfrid and Wilson return.
We can also notice that the other two characters who did not come to the atrium, Wes and Warly, are sailing on a completely different ship. In the trailer, we can see that they met up with Wilson and Wigfrid and gave them some food, and then sailed away. Perhaps they met Winona and opened a portal on the moon island, or maybe they died from malbatross which means that there are 12 survivors, 6 of them got into the portal to the atrium, and the other 6 got into the portal on the moon island.
In addition, I want to say that in the trailer "Don't Starve Together: Return of Them - Turn Of Tides" there are WX-78 and Webber, where they are building a moon altar. Wx-78 and Webber weren't at the atrium either.