Monte Cook has posted a little bit about the latest incarnation of D&D on WotC's site.
It seems, so far, that they are going to take a modular approach to the game system. As a game designer and former computer programmer I find this a very interesting take and I am looking forward to more.
Extrapolating on this I can see the following set up:
D&D5 Basic - A basic box with all the rules you need to play. Basic classes, races and magic.
D&D5 Expert/Advanced - an addition to these rules that take the game into all sorts of directions. Added races, classes, prestige classes and the like. Think of all the cool things from D&D Expert and the AD&D 1st ed DMG.
D&D5 Tactics - a miniature focused set of rules for players/DMs that want more definition in their combats. Sure it makes the combats take longer, but that is the trade off.
Then splats similar to the current Heroes of the Feywild or Heroes of Shadow that expand certain "campaign free" areas of the world.
While reading the "lists of demands" in the 5e boards left feeling nothing but despair for the next edition, the official word from the actual designers is leaving me with more optimism.