While I don't believe the Void will be restored at any point, the fact the characters are leaning heavily into riftwalking suggests 7.0 might spirit us away to another reflection. Just why I couldn't say, and given Yoshi-P said the lead-in to 7.0 won't come until 6.5 I doubt we'll have an answer any time soon.

Or maybe it will be Meracydia or the New World. Leaning toward the former due to its connection to dragons and Vrtra's apparent prominence in the 6.x story.