Why is the world event title old school? I don't think it will tie to the world event because that would lock a bunch of players out of it.
Based on my conversation with CKN I think they cracked it and are being tight lipped. I believe they solved it with just the hints that were given. I thought the pet would be related but believed CKN solved in on PTS when they had only one pet so either we're not doing the right thing with the pet or it's not the pet. I do think the going in without anything equipped is the answer and my guess is maybe the whole 16 person Ops group needs to do that.
They never finished it on the PTS if I recall correctly so they never got the pet on there.