Your Zealous Inferno DLC key will unlock:

3x Caeleth Dawnhammer (Legendary)
5x Sun Burn (Supreme)
20x Banner Man
40x Brother of the Burning Fist
40x Legionnaires
5x Power Tokens (Get 5 extra random surprises)
1x exclusive Legendary Empyrean Avatar - Animated!
1x exclusive Legendary Empyrean Emote - Animated!