I have a theory about the new God of War game regarding the sword, the ribbon (Rue) and the cube (Frank/Phranque).

This is completely baseless as its just and idea but what if the Sword is Excalibur while Rue is the Lady of the Lake (Nimue) and Frank is a fragment of the lake.  I think the name Frank (spelled Phranque in the game) can just be an inside joke playing of of the name of R&B/Pop signer Frank Ocean where Ocean is a reference to the lake itself. 

The way Fey pulls the Sword from Phranque seems to be an illusion to pulling the sword from the stone.  The lake itself being a source of limitless magic and thus a cube or piece of it can very well be sentient.

According to a quick google gemini discrpiption:

The Lady of the Lake is a mystical figure in Arthurian legend. She grants King Arthur the magical sword Excalibur and later reclaims it after his death.

So the cube with the sword in it is possibliy a portion of the lake that holds exclibur.  In the trailer, Phranque says that Rue has to give (or grant) the sword to Fey.  Well, only Nimue can do that so that would make Rue the Lady and Phranque the Lake.  

Any thoughts?

If this is the case, it feels like a fan-fiction.

Lol I mean, God of War in and of itself is a sort of fan fiction of Greek Mythology and other mythoi.   But alas, its just a theory I came up with... and yes I am a GOW fan lol.  Do you have any theories about the sword?  Its identity seems to be a big part of the game itself.

I mean, from the get go I feel showing the afterlife of the gods is a bad idea. Peeks here and there, suggestions and rumours are good, but full on explaining how their afterlife works is just defeating the mystery (also, what happens to those gods who ALSO die in said afterlife? If it is all just a series of recursive plains, isn't it all somewhat pointless? Also, if the greeks and nord gods have their different realms of the dead mortals, how come they don't have their own realms of the dead gods instead of a general one? And so on, and so on). So showing anything at all is a mistake. Whatever they're going to show, it's going to be underwhelming.

I dont think its a bad idea, I think it is them telling the story they want to tell which isn't the preservation of a mystery as thats never what they intended. And there are questions that you ask that can't only be revealed in the full game. Remember, God of War has never been beholden to cannon representations of Myth... since the start of the series. This current story was set in motion at the start of the 2018 game. And the story of a God afterlife outside of where mortals go existed since GoW 3.

Either way I rather just say the story is what it is. I'm really excited to see how it unfold and im very interested to see any other fan theories.

I’m pretty sure your neat and simple explanation of what is going on is not actually it. It is way more likely that whatever is happening in this place is something out of the ordinary and caused by some specific person or event and the story will be to resolve this and everyone moves on to… wherever that may be. The story seems to very specifically tie in to the masks and the thread that was explored in Ragnarok with Odin.