It seems that there's a new version of of the Basic D&D ruleset out on the Wizards of the Coast website.
What used to just be a single document (in standard and printer-friendly formats) is now a set of two documents -- one for the Players, and one for the Dungeon Master.
Here's what the change log says about the revised contents:
This change log indicates significant updates from the previous version of the D&D Basic Rules.
- Added acid splash and poison spray spells.
- Added noble background.
- Added appendix containing the Forgotten Realms deities.
- Added appendix containing descriptions of the five factions that feature in the D&D Adventurers League.
- Legal text added to the footer to allow reproduction for personal purposes.
Of course, it seems that this only tackles the Player's side of things.
In the DM's book, there's a huge section about Monsters, covering monster types, abilities, AC and Proficiency, and then giving a listing of monsters for use in the game. It also provides NPC templates and ways to customize them to your needs. There's also advice on building combat encounters, rules on magic items, and a short list of them.
Looking forward to future updates!