Have you ever developed a game?
I will tell you a secret: coming up with a good, original story line is by far the most difficult thing.
That’s why authors have endlessly drawn inspiration from Norse mythology, greek mythology and geek mythology.
That’s why I’ve had to see Percy Jackson before dying, or Brad Pitt fighting under the walls of Troy in boots - although not much else to complain in Brad’s outfit in that movie
That being said, you can come up with good stories set in a universe we all know.
Valhalla was, if you ask me, a great story (by SG standards) and an appreciable transposition of Norse mythology. It sucked to see Hel fight against Hel thou.
Rather than a random mission in the desert or a mountain pass we could have missions that inform us of heroes’ past.
Shrikewood could tell us why Elkanen and Kadilen decided to leave Alfheim.
By TGW handbook of storyline they left because choose option <they fell in love/they suffered wanderlust/they were tired of immortality/they suffered from anxiety while waiting for the end of the world/Elkanen wanted to see a Kiss concert - that’s why he has his costume/etc>
It’s not that hard to give a spin to those concepts: Elkanen and Kadilen left because they fell in love but their families were fighting for power in the rich and ambitious city of Veronendell and would never approve of their relation. But being elves they were smart enough not to poison themselves to death by mistake. They stopped in Corellia because they are curious to see how naked can local women accept to go into battle just to be noticed by the warrior with the huge… hammer.
They couldn’t leave because they made a bet on who Richard would have chosen between Elena and Vivica: we don’t know Richard’s choice, for now, all we know is that Elkanen won and that’s why every now and then Kadilen has to put on a skirt, which she hates because it’s old style, genderish, and she is far too independent for that.
The thing is… That’s work.
It doesn’t come for free and you have to translate it.
So the more you want to write the more it costs you.
For other background stories on the heroes of Corellia ask and thou shalt be given