Just finished this, took 3 hours.
I suppose you could say he's facing Sub-Zero because of something to do with his former Lin-Kuei status. Or you could say the more obvious he was already in the picture and I had little to work with.

I always pictured Tremor as having sort of a dirt dust coming off him in the way smoke has smoke trails. If anyone ever used the Earth Reaver in Legacy of Kain Defiance? the way dirt comes off those dirt platforms, like that. I picture he'd be hulking over the other ninjas, by at least a foot taller, and could create rock hard dirt formations with his hands, in the way Spider-man's Sandman creates a giant hand hammer and such. He also slams the ground, but unlike Jax [who is just a strong guy] Tremor has control over earthly materials, and could actually create earthquakes, or perhaps cause spikes to rise from the ground. He has a lot of potential, I do wish he would be done justice in a real MK game, So we could stop referring to that horrible spin-off.