As the Vog Cub's section in the Wolver page says, they can be seen in the preview event.
Why not show an image for them?
https://www.youtube.com/watch?v=xUMxpYLJQiM&feature=youtu.be&t=25
There's a video showing them right there, and Golden Trojans could only be seen in that video/the preview event, but they have an image shown...
Go ahead, just make sure it's clear that they're not in-game and whatnot. There's a picture of one on the wolver page's discussion page.