Alright, it sounds pretty solid so far. I see nothng wrong with the deities and while the stats are a little vague, they're still solid and can be well implemented. A few things I'm wondering, however.

So I've read a little of danmachi before (not much) and I'm kind of wondering if you'll implement the skills system or not (I barely know how it works anyway, I just know it's there and am wondering if you're going to use it). Also, I'm kind of confused about the whole 'create a new world' idea and how the characters would fit into the concept. What are the players doing?

I mean, you said something about the gods sealing their powers in weapons and they only correspond to one other dude, but you haven't given us any context as to why they did that. On the subject of context, you haven't really given us much.

This is all just nit picky stuff but I'm curious. Basically, you need more context before pretty much anything. The ideas are solid, but they lack the context necessary to utilize them. I think.