I don't mean "Apple will go bankrupt", but Apple will have a threat register somewhere, and "significant iCloud data leak affecting high profile individuals attracting widespread mainstream press coverage that is due to Apple negligence" will be near the top of that list, and therefore would be one of their "doomsday scenarios" because it is one of the worst things that could plausibly happen to them.
Nothing will happen because your average apple fanboy will keep on buying their shit even if it turns out iphone 6 is made by throwing kittens into a blender.