The most important addition to Endwalker:

[Iscah]

Yeah what is this supposed to be lol. It's like the Silver Surfer had a baby with a pack of sausages and gave rise to a race of lunar balloon animals who, having spent all their evolutionary energy getting to the moon, now lacked the energy to grow faces.

Seems to be what you get when cactuars evolve in one-sixth of Earth's gravity. One of the previewed elite marks appears to be a flowering version.