Page 31 in Arabian Adventures has a summary of the kits – these are the character concepts / ideas. In 5e, they can be represented as a mix of background, class and subclass. The EN world thread has lots of ideas and extra powers. They're coming out with a real PDF later but for now, this is where we're at.
Genasi and elemental stuff from the EE player's companion is on the table. Draconic sorcerer and dragonborn are off the table.
Feats & MC are OK!