No, it won't happen unless they make a cataclysm 2.0. Old zones are for leveling, they are designed with "players don't even have their masteries yet and can only spam 1 button effectively" in mind. Imagine doing Argus with just Wrath in your balance druid arsenal? Imagine doing Argus in 860 ilvl gear and with just Wrath in your arsenal? "Scale everything" is retarded and lazy way to "fix" (read: ruin) leveling and force people into buying boosts.