I haven't dove deep into WoD info yet, but so far what I gather is this. Garrosh escaped into the past, and wants to band the orcs together so they don't drink the blood and go bonkers and plunge themselves into their own demise. But it's been said this is a different past? Basically everything we are going to do in the next expac doesn't really matter because it won't effect our timeline? Then what is the point of it?
If we are stopping Garrosh, so our timeline doesn't change, I heard a certain character, I won't name names because of spoilers, but if you know, you know. He dies, and still it supposedly doesn't effect our timeline's version of him, so then what is the point of going back there? Is it just a parallel dimension? And if it is, what's the point of messing with something that doesn't concern us.
Obviously I am missing a ton of info, so if you guys could correct my ignorant self, and explain what is known so far, that would be great, because right now it seems really confusing, but looks really purdy.