The MMO shooter Destiny will support its clan feature with leaderboards. But why keep statistics for the “Prison of Elders?”
With the next patch for Destiny, they want to give clans, the guilds of Destiny, a new incentive to play together. On the homepage Bungie.net, they will set up leaderboards. Clan members will then be able to see who is leading in various statistics within the clan.
In this “Clan Leaderboard,” players will be able to track their progress and achievements. In a stream yesterday, Bungie gave a preview of the feature. Thus, leaderboards for the best values in the Crucible, who was most successful in the Nightfall strike, and much more could be established.

Why the heck do we keep statistics on the “Prison of Elders” if we do not want to revive it?
Interestingly: They keep statistics on raids, Nightfall strikes, the Crucible, and the Prison of Elders. “The Prison of Elders” is outdated content that no longer plays a role in Year 2. Due to the “wave structure,” the “House of Wolves” content, in the eyes of many, is suitable for reuse in Year 2. With relatively little effort, they could retain the “architecture” and exchange the enemies.

A raid would be more difficult because they are thematically strongly bound. In the prison, in principle, any enemy could be imprisoned.
Additionally, they have previously hinted that they could imagine renewing the “Prison of Elders” from time to time. Bungie-style, they never said it in a “real” way, rather keeping the option open. Holding Bungie accountable for statements about the future of Destiny is a bit like nailing jelly to the wall.
Perhaps this is yet another hint that the Prison of Elders could actually be revived in Year 2 and brought back with the Spring update. Why else would they keep “The Prison of Elders” as a relevant statistic in 2016?
At the moment, however, this is pure speculation.