I would say that far too many draw from Norse, Tolkien (aka English mythology
![Stick out tongue :p :p](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
) and mythologies of Chinese and Indian origin, it's become so clichéd at this point. Here's an unpopular thought, as someone that reads the Holy Bible everyday, there's so much untapped potential there it's not even funny. Obviously as a Christian I don't believe it to be mythology but historical facts. But still, I'd love to see more developers draw inspiration from the stories therein. Now I know we've had a few thousand years of art and entertainment that has done that very thing. But where is the Ben Hur of Videogames? Now I know the latter is not actually a story from the Bible, but it is very much inspired by the gospels and it does something fresh (for it's time) with the material. The problem is too many fall into certain clichés there as well. Like they fell into a rut regarding what's possible there. I think part of it is the potential for controversy, which most are reluctant to get involved with, especially in today's climate.
My advice is to be creative with the content, add your own ideas whilst staying true to the spirit of what's written, no need to stick to the letter, that's a sure way to kill creativity ("the letter kills, the spirit gives life"), kinda like Peter Jackson's approach to LotR's, no adding of current day agendas (which are usually fickle and don't age well), but also no heavy handed preaching. People love games like GOW because of the imagination there and it doesn't talk down to the audience. The story is really about a father and son (an incredible Biblical them if I do say so myself), the focus is not on the epic setting. Ben Hur did the same actually, the setting is important, but you can tell new stories against that backdrop.
Now the Bible is for the most part a lot more grounded than these mythologies you mentioned (mainly because it actually happened
![Wink ;) ;)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
, people like grounded now I think, it makes it so that when something supernatural does happen, it's that much more impacting, isn't that the definition of a miracle, it has to be rare to be classified as one, anyway, I digress. There's the potential for every kind of genre and new ones if people would do some digging there. If anyone wants some good reading, I recommend starting with the book of Daniel (in a modern translation like the NIV), it's short, easy reading and has an amazing backdrop with the clashing of the superpowers of the day, Nebuchadnezzar is a fascinating individual as well (the names alone make it worth while!), not to mention all of the fantastical elements of the story (the four living alone creatures deserve to be realised with today's tech, amazing creatures).
But no, instead we'll probably get another game set in the Norse mythology...people are prone to play it safe.