My little brother was curious about this, so I'm not exactly sure of detailed specifics. All I know is the version of Ganondorf doesn't matter, CIS off, fight takes place in Hyrule. Pretty standard, really.
Well, like most powerful Warcraft characters, he can do a lot and has a fairly versatile power set. Leaving destruction beneath him by merely flying over stuff is just one of his abilities.
Deathwing is also a high-level magic user(which, again, involves a lot of stuff), possesses extremely powerful Chthonic powers, insane durability and magic resistance. He's city-level at his most casual.
__________________ And from the ashes he rose, like a black cloud. The Sin of one became the Sin of many.
Gender: Male Location: 1/9.7'rd Horseman of the Apocalypse
Maybe, but I still can't remember much. He used to show up a lot in VGVS and shit, but it's been a long ass time and I can't remember what would give him the win.
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The moon and stars aren't just shades of lead
But you wouldn't know as you rest your head.
Because Ganondorf can recover from physical attacks like that? Or turn intangible and stuff.
Alright, so I still don't know too much about Deathwing, so I'll be basing my thoughts on that trailer. Forgive me, I know not of what I speak.
Deathwing caused a flood. Ganondorf survived the gods flooding the world. The fire is iffy, since it's better than what Valoo has, but it still warrants mention that Ganondorf took a blast of dragon's fire to the face unscathed. Deathwing doesn't really do much else in the trailer, so I don't see him winning yet. Would need to know more about his magic, as just that physical stuff isn't going to do it.
Also, someone should explain to me why Deathwing having pikes and hot metal driven into his flesh by those rams is "agony" and why it indicates good durability. Where I stand it's not an impressive showing, as Ganondorf is easily strong enough pierce him in that case.
Gender: Male Location: 1/9.7'rd Horseman of the Apocalypse
If my memory serves, the hot metal is actually Deathwing's armour, which is made of (nonmarvel) adamantium and is keeping him alive, because this thing http://www.wowwiki.com/Demon_Soul is killing him.
__________________
The moon and stars aren't just shades of lead
But you wouldn't know as you rest your head.