The last time I spoke with Mike Mearls was when we collaborated on
AEG's Relics. With the release of 5th Edition I had an opportunity to
catch up with Mearls again and address a lot of outstanding questions
that have been percolating in the forums: the future of missing 4E
products, 5E and MMORPGs, a D&D movie, Modern and wargame add-ons for
D&D, future (and legacy) campaign settings, and how we'll know 5th
Edition is a success.
http://www.examiner.com/rpg-in-national/interview-with-mike-mearls-5th-edition-dungeons-dragons-team-leader