I bet they will publish the basic product at GenCon. The Standard rules will come later, maybe at christmas (the big three with the full classes and all the subclasses). So the new "Red Box" from level 1 to level 20 with the 4 basic classes (so warrior and no gladiator or knight) and 4 basic races. Just the classic red box basic stuff with classic monsters. Everything for the beginner to have an iconic and classic D&D experience through 20 levels in one box. This will be the evergreen starter product that will make the most money selling through Wallmart and so on to RPG beginners. Kinda like Monopoly.
-YRUSirus
It does seem as though one's satisfaction with the game influences whether it can be done or not. Here, where people are largely satisfied with the rules as a whole, even if they have sharp criticisms of particular aspects, GenCon 2014 is the lead vote getter. Over on rpg.net, where common reactions to the game are that it's a broken mess, many people feel like there's no way it can be ready by GenCon 2014.About a month before GenCon next year.
Or, just possibly, never. (Though my fear that that might be the case has dropped off pretty dramatically - a year ago, I thought it was a risk; now, not so much.)
A basic set at gencon and the full books out before Christmas would probably be a pretty good strategy.