The Protectors of Etheria is a stand-alone mod of the game Warlords Battlecry 3 (i.e. it can be run without having the original game installed - 100% free full game). It is an improved RTS/RPG game with new campaigns, quests, terrain, units, items, heroes, modding features and more. Beta versions available for download!
This is the victory screen for the Undead. (It's also the box art for WBC2!)
Now each race can have their very own picture for their defeat / victory popup. As you can probably tell by this very Undead looking popup, this is the victory popup for Undead.
But like with the RSB buttons, this'll probably be something that gets constantly updated across multiple versions, with more images being introduced in future patches. So don't expect every race to get their popup images in 8.7.
Oh and ignore the race panel at the bottom - there's just some road-works going on right now.