While I usually agree with Malstrom's analysis, this one is obviously his own speculation, and he didn't even try disguising it as anything else.
In another, older article, Malstrom said that:
"First of all, those who are saying that Blizzard is doing this to gain more money, or that WoW influenced them, or that Activision is telling them what to do are all wrong. Blizzard is one of the very few game companies around which can essentially do whatever they want. They can take as long as they want on a game. They can not release a game if they don’t want to. Publishers aren’t going to mess with the golden goose. After WoW, Blizzard has free reign to do anything, absolutely anything, it wants.
What we do know is that Blizzard’s developers generally have the freedom to do what they want. The cause of the Starcraft 2 trilogy is not coming from a corporate plan to rape the consumer. It is coming from developer narcissism."
