The Basic Rules have been updated to include two new spells and added some appendices More important there is now a Dungeon Master PDF with encounter building guildlines, monsters, and magic items! Not a complete list by any means but enough to get started.
One thing I noticed right off the bat in the DM guidelines is that there a section of what are in essence NPC templates. You combine those with the race or humanoid monster of choice and you have a fleshed out basic NPC.
The Whole of Fantasy and Dungeons & Dragons
1 hour ago