They announced a new edition of D&D, as well as the promise of a new setting.
Here's my prediction:
...a 5E version of BECMI, with Mystara as the setting. I believe (hope) that they come up with an even more simplified D&D5e ala Basic Edition. It will come in a boxed set like the original (maybe multiple boxed sets). Then revive the Gazeteers of Mystara.
Why?
Because modern 5e is too super-powered. That's why many people still play Basic or search out OSR. And while I love the indy press, WotC has the means to crank out support books on a regular basis.
Also because, while 5e is easier than many predecessors, it requires a $50 buy in per core book and each book is a hefty tome for a new player to wade through. That's why they created the Essentials boxed sets. But making an rules-lite-r version of D&D may hook a broader audience. Some may stay with Basic, while others may move on to advanced, but support both game styles.
Of course, I'm probably way off base. I suspect my crystal ball is actually plexiglass.
