Blizzard stated they felt more safe (or whatever the exact wording was) developing the same 3 franchises instead of trying to make new ones. and it boggles the mind, because that's what small studios do when they get a hit like Diablo (well, of a smaller magnitude) - they keep milking it, because it is a safer investment.
and Blizzard has so much money. but they feel it is better to waste 7 years of development (in wages) than to actually try something new? and it's better to develop a new Diablo or Warcraft game for half a decade, making sure it's as polished as it can be, because their reputation of releasing extremely well polished games is more important?
what does it tell me: they can't release a game that's just slightly better than any other game on the market. their game just has to become the biggest thing of the decade. somewhat like Valve, that doesn't want to just release a new Half-Life title: if and when they do, it will have to be ground breaking.
and that's ridiculous.