Gaile Gray put out a statement on the forums regarding some changes towards PvP achievements for maps. PvP map achievements will no longer be temporary, they will become permanently achievable. Existing maps that do not currently have their own set of achievements will get one at a later date.
The full statement:
A message from the PvP Team:
Hi all,
We’ve been monitoring your feedback regarding the temporary achievements included with the recent PvP map releases, and we wanted to let you know that we’ve decided to make those achievements permanently obtainable. In addition, we will continue to offer the achievements for Eternal Coliseum and will be reactivating those related to Revenge of the Capricorn in the future to give players another chance to complete them. Lastly, we wanted to let you know that we’re planning to introduce map achievements for each of the existing PvP maps in a later release. We’ll have more information on those as the time gets closer.
Thanks!
The PvP team
From:
https://forum-en.guildwars2.com/forum/game/pvp/Update-on-PvP-Map-Achievements