Here's every new Unique and Legendary Aspect coming to Diablo 4 in Season 1

techradar.com:

New Legendary Aspects and unique items have been added to Diablo 4 in the latest pre-Season 1 patch to the massively popular ARPG. 

Diablo 4 has shown no signs of slowing down since its early June release as Season 1:  Season of the Malignant, which launches tomorrow (July 20) is set to add a brand new storyline to the intense isometric dungeon crawler. Ahead of this, though, is the last pre-Battle Pass patch that includes a total of six unique items and seven Legendary Aspects in the game. 

Announced in the full 1.1.0abuild patch notes, the new Unique items can be found in World Tier IV with the Legendary Aspects being obtainable from any World Tier available. The new 6 Unique Items include the Ahavarion Spear of Lycander, an Uber Unique Staff for all classes, which gains a random Shine Effect for 10-20 seconds after defeating an Elite enemy once every 30 seconds. The development team has said it's: «an extremely rare drop», so good luck finding it in the post-game carnage. 

Here's everything else added to the pre-Season 1 of Diablo 4 by class: 

Barbarian: 

Azurewrath (Unique Sword): Lucky Hit — Your Core Skills have up to a 20% chance to Freeze enemies for 3 seconds and deal 0.75-1.5 Cold damage to them.

Druid: 

Fleshrender (Unique One-Hand Mace): Debilitating Roar and Blood Howl deal 0.5-1.0 damage to Nearby Poisoned enemies.

Necromancer: 

Lidless Wall (Unique Shield): Lucky Hit — While you have an active Bone Storm, hitting an enemy outside of a Bone Storm has up to a 5-25% chance to spawn an additional Bone Storm at their location. Each of your active Sacrifice bonuses increases the chance by 25% and the total number of additional Bone Storms you can have by +1.

Rogue: 

Eaglehorn (Unique Bow): Penetrating Shot has a 30-80%