Datamining of the Season 4 patch (v4.0.0) has reveal a number of upcoming cosmetics.  Here’s what to expect over the coming weeks:

Update: Names and rarities added thanks to Storm Shield One‘s Cosmetic Database

Liteshow (Uncommon) and Nitelite (Uncommon)

Chromium (Rare) and Diecast (Rare)

Abstrakt (Epic) and Trailblazer (Epic)

Royale Bomber (Epic) and Glow Stick (Rare)

Tenderizer (Rare) and Renegade Roller (Epic)

Persuader (Rare) and Glow Rider (Uncommon)

Steadfast (Uncommon) and Solid Strider (Uncommon)

Tag Bag (Epic) and True North (Epic)

 

Emotes (coloured rarities)