Here's how you really solve the 'settings problem':
WotC should just produce a comprehensive and detailed 'world building guide' that gives new DMs the tools, abilities, ideas, and seeds to create their own worlds whole cloth. The current DMG does this a little bit, but I'm thinking an entire hardbound book.
Other publishers have done just this, and there is a lot of material out there, but I think there are probably a lot of D&D players and DMs who never venture into 3rd party content - I could be wrong. Regardless, having the official D&D/WotC mark on a setting creation guide would definitely attract people.
WotC should just produce a comprehensive and detailed 'world building guide' that gives new DMs the tools, abilities, ideas, and seeds to create their own worlds whole cloth. The current DMG does this a little bit, but I'm thinking an entire hardbound book.
Other publishers have done just this, and there is a lot of material out there, but I think there are probably a lot of D&D players and DMs who never venture into 3rd party content - I could be wrong. Regardless, having the official D&D/WotC mark on a setting creation guide would definitely attract people.