finally finished reading the 13 story that went with Xbox 360 International, I now see how everything fits, correct me if I'm wrong
ok so according to that show at one of SE's conferences, the Tale of the Crystals mythology is divided into the "visible" and "invisible" world
there used to be a grand goddess whose son banished her to the invisible world, this god then created Pulse, Etro, and Lindzei before he went to sleep as a crystal
Etro become death but she was the one who created humans and now lives in the "invisible world"
at the end of the Xbox 360 story, Light was wondering in a weird unknown place, which is the invisible world so that's where the story for 13-2 will take place and it will probably about her finding (or becoming) etro and protecting the world from the "invisible world"

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pretty much right, yea.
though she probably wont be protecting the visible from the invisible world, but try to keep the balance between the two since they can only coexist. like light and shadow.

in recent news its also said that the story will take place in both worlds...

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