Forum:Policy on replacing old info with Cata info?

As you know, the changes are HUGE. People die, people become undead, zones are completely changed...

My question is, how do we carry out this changes? Is there any policy or guide on it? Perhaps make a "Before the Cataclysm" section and put all the old info there?

I found Galen Trollbane is a forsaken now, how should I reflect those changes in his page? :S--Lon-ami (talk) 11:55, July 1, 2010 (UTC)
 * Help:Updating for Cataclysm.-- 12:07, July 1, 2010 (UTC)