What we know
Panel reporting says transmog is planned as an opt-in system, including a control for whether you see transformed appearances on other players.
What beta needs to answer
Unlock rules
Gold / material cost
Collection behavior
PvP visibility
Guild / party visibility
Classic item appearance rules
Verification status: this is an announcement-day system page. Exact values, unlock requirements and restrictions will be added only after Blizzard documentation or direct beta verification.
Current source: BlizzCon panel report ↗