I really think it's just a matter of money.
I'd really have liked a 2 book (3 with monsters) setting model, because I like DS, but I was not surprised of the news.
Let's face it: Forgotten Realms and Eberron are the big league. Almost every new player is going to play one of the two, maybe both.
Dark Sun is the first oddball setting. I can understand if at WotC don't want to risk it, and expect far lesser sales.
Less sales = lower break even point = higher cost x page. Since as other said there's already the need for a dedicated monster manual, due to the nature of the setting, and if you want to include psionics you also need the PH3, the only sound option is to pack player and DM stuff in only one book.
I'd really have liked a 2 book (3 with monsters) setting model, because I like DS, but I was not surprised of the news.
Let's face it: Forgotten Realms and Eberron are the big league. Almost every new player is going to play one of the two, maybe both.
Dark Sun is the first oddball setting. I can understand if at WotC don't want to risk it, and expect far lesser sales.
Less sales = lower break even point = higher cost x page. Since as other said there's already the need for a dedicated monster manual, due to the nature of the setting, and if you want to include psionics you also need the PH3, the only sound option is to pack player and DM stuff in only one book.