That part. I don't understand how disabling items will enable an event.

But it doesn't matter. As long as you are saying it will be back I'm happy :-)
Let me clarify then from what I understood by it.
They are going to disable the drops or make them unable to be equipped until 232 ilvl is obtainable from raids.
Once they have done that which shouldnt take to long I pressume? They are going to enable the event again.