They could have meant that but it seems like such a strange way to word it since in all previous expansions it has always been called relic weapons or relic series. Not sure why they wouldn't use the already established language they created.
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While they did say not all of the content in future patches was announced in the LL, I'm not terribly hopeful for a new relic zone with resources already being devoted to the Criterion and Island Sanctuary.
I do not believe they will add a relic zone.
The new zone will be the island for individuals and relics will focus on FATES, dungeons and raids.
Why? Well, a large amount of players focused on those instead of Boja when they had the opportunity so the resources on a relic zone is going elsewhere.