Blizzard has released a new gameplay trailer for their latest Season, released alongside Vessel of Hatred — Season of Hatred Rising! Season 6 introduces players to gameplay features such as Realmwalkers, Seething Realms, and Seething Opals, along with quality-of-life improvements such as the Party Finder system.
Diablo 4 Season of Hatred Rising Overview Realmwalkers & Seething Realms Guide