The Greatsword of Artorias will take 20 intelligence and 18 dexterity to wield. Additionally, the weapon has B-grade scaling on intelligence and faith, C on strength and dexterity. So unless you're willing to put some serious hours into grinding to get all those stats to 40, I wouldn't recommend using that.
Dark Souls is the better game since it refines a lot of the concepts from Demon's Souls, but at the same time, playing Demon's Souls first is a better idea. Makes Dark Souls even easier knowing its mechanics beforehand.
Still can't figure out if this is in the past or the future. Calling it Dark Souls 2 infers that its continuing from where Dark Souls 1 left off but their are dragons or talk of dragons or something like that so that kind of infers that it takes place before DKS1 since there's no dragon talk in the game expect for the dlc but that took place centuries earlier.
I think a sequel in this case just means another story in the world of Dark Souls. Lordran was only a very small part of the world. There's still plenty that we haven't seen or been told about that world. Allows them plenty of freedom to explore story-wise.
The reveal trailer is the only thing that suggests there's dragons (kinda looked a bit similar to Kalameet), and even then, it could just be another straggler like the one in Ash Lake. The mansion only alluded to dragons being experimented on ages ago, not that they were still alive. Drakes seem to be the only dragon-like being still in existence.
So many dragons being shown definitely makes me think prequel. Unless dragons somehow manage to return to the land after the first game. Or maybe they're just drakes again and the lead guy isn't clarifying that point.
I'm pretty sure the guy clearly said drakes were what was swarming that castle. The big skeleton, on the other hand, was a dragon. Said something about experiments being done on ancient dragons.
It would have to be, dragons are basically extinct in dark souls
No, there was that valley of dragons and there were plenty of dragon bosses.
Only a couple: Seath, one of the two remaining dragons (the other being the one that runs the Path of the Dragon covenant in Ash Lake), and Kalameet, who's part of the DLC that takes you to the past. The valley you mention is full of drakes -- considered to be the lesser cousins of dragons.
EDIT: Forgot about the Gaping Dragon! That makes three.