Here's the ESO Datamine (July 2020) from the Update 6.1.0 on PTS (Stonethorn DLC). It features future Crown Store items and the next Crown Crate season - Sovngarde Crown Crates.
Two of the more unique new additions coming with this update are a 2-player Mount, the Duo-Dynamo Dwarven Spider, and House Guests, which are Collectible NPCs that you can place in your house and interact with.
Other notable and perhaps long-awaited items are the Misanthropic Lycanthrope Hair Style ("The Mullet") and the Bard Personality.
As usual, there are also quite a few Adornments, Face and Body Markings, Costumes, Mounts, Pets, a couple of Houses, some Furniture and a bit of other stuff as well. Including what seem to be the Sovngarde Crown Crates Radiant Apex Mounts: Auric Sabre Cat Duskstalker, Lambent Shadowmane Courser and Silver Nimbus Wolf.
Finally, there are textures for Potentate Crown Crates, another Crown Crate season that will likely follow the Sovngarde Crates and contain Cyrodiilic and Imperial-themed items, thus hinting at Cyrodiil as a possible location for the next year's chapter.
If you want to discuss this datamine with other ESO players, you can join the ESO Model Viewer Discord server.
Keep in mind that these pictures were found in the game files and the items pictured are not officially confirmed. As such, they might change significantly on release or might never be released at all.