We've datamined two recolors of the Drake Rider sets introduced in previous Dragonriding Cups.
These are likely being introduced in the new Dragonriding cups coming later in 2024, as datamined during Patch 10.2, such as Northrend and Pandaria cups.
The names of the datamined items are «Icy» and «Azure»--although to us it seems one of the tints is more Broken-Isles themed with Legion colors.
We've also datamined some tabard rewards--Frosted Riders of Azeroth Tabard from Northrend Racing Completionist: Gold, as well as Azure Riders of Azeroth Tabard.