Dark Souls kicked my ass for a solid 4 hours in the first city before I realized I wasn't up to the challenge.
When I first got Dark Souls I got my ass kicked for a good eight hours. I finally set the game down for the day and picked up tomorrow. When the next day came, it was as if something clicked and I immediately began doing better. Dark Souls just takes a bit of trial and error to beat.
I also just re-watched the trailer and I am definitely convinced that is Solaire.
1. One point in the trailer, the narrator says, "Forever without LIGHT..."
In Dark Souls, Solaire had basically gone bat stuff insane looking for his "sun". This makes me believe that the knight in the trailer was Solaire before he went bonkers.
2. The one girl in the trailer (haven't come up with any theories as to who she is, maybe the fourth knight of Gywn?) gives the knight a feather.
Solaire wears a feather on his helmet in Dark Souls. Small connection but Dark Souls has always known to be subtle.
3. The knight's armor.
Solaire's armor is extremely similar to the armor in the trailer. The only significant difference is the helmet and the lack of an emblem on the chest piece.
4. Last but not least, only Solaire could kick that much ass in the trailer.