If you sell 10 of A and 5 of B then which one would you choose to feature?
I feel that it would be hard not to sell 10 of A before 5 or B when B doesn’t exist as an option until well after A has been released and supplemented numerous times. If at all, in the case of the current edition. They can’t sell more of Dragonlance or Planescape or Spelljammer or Dark Sun if they don’t release them. Sure, FR might have sold more in some previous editions of the game (mainly because of its more frequent released supplement books), but we won’t know which setting would sell more than FR in this edition until it’s out. And even then, the only thing we might have to measure that by is Amazon rankings, because I’m sure they won’t release a numeric sales comparison between the existing settings and the “new-old” settings they claim to be releasing.
I feel like any decently-done DL setting book will probably blow the doors off of all of the current setting specific books. But then FR is kinda in just about
everything WotC have released to date, so do we count all of those books in FR’s corner too then? Or just SCAG? I’m pretty certain DL could outsell that.