Larian explicitly stated that they will only implement the Player's Handbook. Though I am sure modders will have a field day with the diff subclasses from other source books.
4. There have been hints of other 5e sources being implemented into the game. Are you going to include material from Mordenkainen's Tome of Foes, Xanathar's Guide to Everything, and/or other player materials outside of the core material of the 5e Player's Handbook? Additionally, at full release, will all content of the PHB be represented (notably, (sub)classes and (sub)races)?
HB/MM/DMG are the base we are starting from but we are taking material from other books too.
Yeah, I was there. Please, point out to me when Larian did not shut down any question about additional subclasses from other source books, by stating that they focus on including all the Player's Handbook's subclasses. Let's keep the expectations realistic.
