First new leaked skins for Season 4, datamined by DieBuddies. Some of these skins are rewarded when progressing in the Battle Pass:
You can see the all the leaked Gliders, Pickaxes and Backblings here:
You can see the skins that are awarded with the Battle Pass here.
As always, we will be let you know the names and rarities of the skins once that information has been released.