well different timeline would be fine, but far future... eh, that would have to be WAY further or it would create all sort of lore problems
lets say theres anduins tomb with plaque saying how he died, that would spoil future plot for wow
and you cant really create the world ignoring the past completely so either waaaaaay further in the future, or as you said different timeline, but im not sure how would people take that after WoD