Forum:Old format deck?

I thought it would be interesting if they made another format that took the ban list from an older ban list and allowed it to be played today. The rules would be something like this:

1)If you use something like the "September 2004 Ban list" then you CAN ONLY USE THE CARDS THAT WERE MADE AT THAT TIME PERIOD. So you can't make a synchro chaos emperor deck :P 2)Only certain ban lists would be available. 3)You must tell your opponent would list your going by if your going by a different list.