I'm skipping ahead a little so forgive me if I'm repeating someone else's thoughts. I don't dilution of the brand has to be a concern if this is handled right. 2008 we get FR. 2009 we get Eberron. These are money makers and will likely spawn a product line for each (hopefully not one that is too aggressive), but nothing says a setting must have multiple books a year to be successful.
Put out one-off setting bibles that contain the material to run the setting, and the most setting specific rules. Support them with general rules in the DMG, PHB, and MM lines. Support them with the occasional Dragon article or Dungeon adventure, and when an idea that is big enough and good enough for a supplemental book turns up. Release it.
A glut of campaign settings didn't kill 2e. I don't care who says it. A glut of (often bad) product did. There was a mentality that every setting needed X number of books a year, and they didn't.
I don't currently collect campaign settings, as I don't want to invest the cash into whole new product lines... but if a single product line was launched that provided 1 setting a year and a promise of minimal campaign specific supplementation. I'd likely pick those up.
Put out one-off setting bibles that contain the material to run the setting, and the most setting specific rules. Support them with general rules in the DMG, PHB, and MM lines. Support them with the occasional Dragon article or Dungeon adventure, and when an idea that is big enough and good enough for a supplemental book turns up. Release it.
A glut of campaign settings didn't kill 2e. I don't care who says it. A glut of (often bad) product did. There was a mentality that every setting needed X number of books a year, and they didn't.
I don't currently collect campaign settings, as I don't want to invest the cash into whole new product lines... but if a single product line was launched that provided 1 setting a year and a promise of minimal campaign specific supplementation. I'd likely pick those up.