I dont particularly agree with this, and they wont want to go through the effort of making these events happen on the new server whilst simultaneously having to separately do the events on the main one.
And it would still mean not all rares would be in the game until a full year where all events would have gradually taken place.
I think if they do plan on putting them back in, which i dont think is the best of ideas, they should make it completely random to make it fair, by rather:
1.)
Make rares an ultra rare monster drop, for the week first, setting a cap on how many drop as a whole, as well as per player, we dont want any super lucky players getting 10 phats whilst others get 0.
This would be ALL monsters have possibility of dropping, as everyone will be low levels for the first week of the game, could rather be for the first week only, or after a set quantity of rares have been obtained.
2.)
Schedule several events taking place in all time-zones to give all players across the world a fair chance to obtain rares, dropping them randomly around the map or in a designated location.
3.)
Randomly insert rares into random players banks, until the set threshold is reached, let luck do its work.