September 14, 2026 — Diablo 4's Season of Hell's Legacy (Season 15) starts tomorrow, September 15. Roundup of the launch-eve picture, per Duskforge's BlizzCon-week coverage (fan site; Blizzard patch notes remain the authority where they differ).
TL;DR
- Launch: tomorrow, Sep 15. PSN patch shipped a day early and is erroring for PlayStation players (per Duskforge)
- Season Blessings: Smoldering Ashes boost salvage materials through Glyph upgrades
- Horadric Cube rework: reroll affixes, protect Greater Affixes, convert a perfect Unique into a Mythic
- Difficulties: Expert and Penitent unlock without finishing the campaign; higher Torment tiers grant more XP
- Mythic crafting: Iconic Mythics stay Mythic-only after PTR feedback; new Blacksmith cache targets them directly
- Rewards: free bear pet via Season Ranks, plus Mythic caches, Sparks, 125 objectives
- Theme: Dark Wanderer transformation, nearly 20 classic bosses and heroes back, Deckard Cain returns, Prime Evils loose
Watch items at launch
- Whether the PSN early-patch errors are resolved before the season opens
- Final Mythic crafting numbers after the PTR-feedback revision
- How the Cube's perfect-Unique-to-Mythic conversion rate lands in the first week
Bottom line
Hell's Legacy is a systems-heavy season (Cube, Blessings, difficulties, crafting) wrapped in a nostalgia theme. The mechanics affect every build; the Dark Wanderer wrapper is the hook. Blizzard also confirmed development continues past Season 15 — Season 16 and further seasons are already planned despite the Diablo 5 announcement (per BlizzardWatch). Coverage continues once the season is live and numbers settle.
Related: BlizzCon Diablo season drops, Diablo V announced for Spring 2029.