All 12 core classes they already stated would be added most likely late december we will probably see a patch for druid bard and paladin based on the rumor mill. Artificer was not confirmed to be being added but with feedback we will most likely see it as part of a dlc since there are only 13 official acknowledged classes everything else falls under subclasses in 5e. Hexblade and oathbreaker have been brought up several times and were hinted at in interviews but not confirmed.
