Blizzard confirms it's working on a 1-5 player 'story difficulty' for its big raids in World of Warcraft: The War Within, and it's honestly about time

World of Warcraft's always had an issue with its storytelling—I mean, it's historically had a lot of issues if you tally them all up—but first and foremost is the problem that, if you want to cap off the expansion story, then you'll need to get your raiding boots on.

That's nothing too unusual for the expansions of WoW's yesteryear, where being invested in the game's story was more of an optional thing for lore enthusiasts. Still important, which was why it was all there, but by no means the central draw.