Ok this ISN'T my view, a person named John Anderson (I think thats his name) said something about this.
He said best thing to get public to want a game is give it hype, create a forum and leak few information about the game little by little, people will create so much hype talking about the game like armor, weapons, magic style etc they would create a totally different game then the original idea by the programmers had. We people talk about it and then some visitor would read something and say "Gee wiz this is cool" and want to buy the game. in the end the programmers may take a few simple ideas out of a billion.
He also said they like to be secretive, again to hype to say "we got something up our sleave" but they could be saying "We have no idea what to do next so we bluff"
Personally i just thought i say this (wish i found the address of this ranter) but thats what Adnerson or what ever said its their tactic to get a crowd to buy something.
Donno maybe true or maybe not,