Was just wonder what were all the new contents that were hinted in the 18th floor. i noticed a few but I might have missed some.
Yoshi-P NPC hinted Samurai and Red Mage was coming in the future xpac.
Another NPC hinted that the "final boss" will be the next extreme battle, I'm assuming they meant Thordan and the Knights of the Round.
What else was mentioned?
Well a quick scan of the 1st page of General would have given you that answer but yes you're mostly right with those youve spotted.
There was also a vague hint of doomtrain, and the two un-named NPCs were debating which comes after white and black, red or blue (red and blue mage).
According to Yoshida, the next primal was teased somewhere. Doomtrain was mentioned, but it could be a red herring with how explicit it was. The only other mention of a primal was "A cross between a behemoth and a bomb."