Many of us theorize that this game is set in the past. The lack of pyromancy and the existence of dragons is a large giveaway of these theories. This could possibly be taking place during the dragon wars.
This means that the flame exists, but chaos does not yet. However, I feel that the flame has a reach that we will learn about in this game.
In Lordran, there were no cold zones besides the Painted World. Everything was generally warm and habitable by basically anything. I feel as if the flame was the reason things were like this. Its power, its heat, expanded across the land. All that it touched was controllable by the gods.
Now, when the flame started to fade, the gods started to leave. We know for a fact that Gwynevere and her husband left Lordran, and that others left as well. Based on a tweet from Miyazaki, I believe we will be seeing them in this new land. "Before the darkness. What would make the gods leave?"
But this leaves me in a confused state. As far as I know, the dragons were defeated before the flames began to fade. Clearly it wasn't very long after the dragons were slain that the flames began to fade, seeing as how some survived, but I was sure that the gods left because of the corruption of the flame to chaos. But due to the lack of pyromancy and the high amount of dragons, clearly something else happened.
So what do people think made them leave, and do you think we will see them in DkS2?