I don't think there's gonna be a wealth by level chart, i think there only will be guidelines on how to handle treasures and magic items. And i hope so, because I never used them in past editions, except when creating High-Level PC...
I hope they just don't put Dragonborn in the Flanaess by means of a cataclysm or what. There is a whole continent out there. They should come from...umh Lynn?