After talking about it with a lot of players, 2 mount ideas sounded too awesome to ignore.
The first is the Gobwidow from The Cuff of the Father. It just looks so nice, it'd be amazing, but it still doesn't hold a candle to...
The Burden of the Son's boss, 4 or 5 mounts that can be fused to make a 4-5 people Brute Justice mount. It'd be so awesome, Sentai-style. If it doesn't make it to the game, I hope it'll at least give a chuckle to the mount development team :)