Janichsan, on October 13th 2008, 11:58 AM, said:
The exact statement is as follows:
So they are not standalone games. The Zerg and Protoss campaigns are to (likely) be sold as expansions – and are probably appropriately priced – but offer the amount of content a full game would. That's what he meant.
The Dawn of War method Quanta mentioned would also be possible, of course.
That's one quote, but what I've read otherwise has stated straight that they will be stand-alone functional.
Here's some more Blizzard quotes:
Blizzard employees said:
As for pricing -- a big concern for gamers who fear this may be a ploy to sell the same game three times -- neither Sigaty nor Pardo were ready to give any details. "You know, we haven't even talked about that yet," said Sigaty. "I don't know. They're definitely full-sized games. I mean, the scope will be big; it's going to be 26 to 30 missions in the first one, and we intend to have at least that much in the next after that."
Pardo was also quick to explain that the pricing will depend on how much content is in each release. "We would do the retail price based on the value that we're putting in the box," he said. "So, if the value in the box is less than the original, then we're going to price it like that. We're not just trying to get people to pay full-price for something that's less; if the follow-ups end up having the feature set of an expansion, then that's how they'll get priced."
To me that sounds an awful like they're trying to avoid, as much as possible, saying straight out that each installment will run full price, knowing how unpopular that will be. And reading between the lines, it also sounds like full price is what they intend.