I am hoping for some sublcasses/races that aren't just in the Players Handbook, specifically Oath of Redemption Paladin, I think Pact of the Genie Warlock could be fun, Circle of the Spores Druid (maybe even these shadow druids, that might be cool) as well as Deep Gnomes, Goblins, and especially Kobolds (gotta love 'em too adorable not too). Fae Pact for Warlock as well is real nice! Other than content additional races/subclasses, I would say Origin Characters would be cool!