I don't know what it is about the intro screen, but it instantly came to me when I looked at it.
It could be as simple as an engeneering pattern or it could be a reward for glory of the deathwing raider,
I just think this would be a sweet mount (albeit a ground mount)
and yes, I am a HUGE Mario Kart fan.
(I hope you can make out the player in the picture he is kinda small but the head is just below Deathy's eye)