Blizzard has been quiet for some years. And they surely has planned this from the very beginning. Why don't they merge all the 3 campaign into 1 package? All the reason i can think is they care about money because they know the millions of fan has wait for a long time for the sequel, hence the long time has generated the hype surrounding the game. No doubt, it is a great game but Blizzard look greedy.

that actually got me slightly interested.

you know, sometimes you just wanna play/watch something without using your brain at all.