Here's the ESO Datamine (January 2021) from the Update 6.3.0 on PTS (Flames of Ambition DLC). It features future Crown Store items and the next Crown Crate season - Ayleid Crown Crates.
This datamine includes new Adornments, Body and Head Markings, Costumes, Crafting Motifs and Outfit Styles, Mounts, Pets, two Houses, Furniture and a few other usual Crown Store items.
The Radiant Apex Mounts from the Ayleid Crates will likely be Culandaborn Senche, Varlaborn Wolf and Welkyndborn Courser.
There are also a couple of new skins (Hollow Void Husk and Varlaborn) that most likely will be in the Ayleid Crates and two Polymorphs as well: Sylvan Spriggan and Bloodroot Spriggan.
Finally, there are three new Houseguests, including Lyranth! Sadly her art isn't in the files yet so currently there is only a placeholder image instead of it.
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.