Blizzard have showcased the many features you can get with the three editions of Diablo 4. You can pre-order the game here.
Diablo 4 Editions (Source)
Edition
Standard Edition
Up to four days of Early Access to Diablo IV’s launch***
Accelerated Seasonal Battle Pass Unlock in Diablo IV—includes a Premium Seasonal Battle Pass Unlock plus 20 Tier Skips and a cosmetic
Wings of the Creator Emote in Diablo IV
Hellborn Carapace Mount Armor in Diablo IV
Temptation Mount in Diablo IV
Early Access to the Open Beta*
Light Bearer Mount in Diablo IV
Inarius Wings and Inarius Murloc Pet in Diablo III**
Amalgam of Rage Mount in World of Warcraft**
Umber Winged Darkness Cosmetic Set in Diablo Immortal**
Digital copy of Diablo IV game
Digital Deluxe Edition
Up to four days of Early Access to Diablo IV’s launch***
Premium Seasonal Battle Pass Unlock in Diablo IV
Hellborn Carapace Mount Armor in Diablo IV
Temptation Mount in Diablo IV
Early Access to the Open Beta*
Light Bearer Mount in Diablo IV
Inarius Wings and Inarius Murloc Pet in Diablo III**
Amalgam of Rage Mount in World of Warcraft**
Umber Winged Darkness Cosmetic Set in Diablo Immortal**
Digital copy of Diablo IV game
Ultimate Edition
Up to four days of Early Access to Diablo IV’s launch***
Accelerated Seasonal Battle Pass Unlock in Diablo IV—includes a Premium Seasonal Battle Pass Unlock plus 20 Tier Skips and a cosmetic
Wings of the Creator Emote in Diablo IV
Hellborn Carapace Mount Armor in Diablo IV
Temptation Mount in Diablo IV
Early Access to the Open Beta*
Light Bearer Mount in Diablo IV
Inarius Wings and Inarius Murloc Pet in Diablo III**
Amalgam of Rage Mount in World of Warcraft**
Umber Winged Darkness Cosmetic Set in Diablo Immortal**
Digital copy of Diablo IV game