Another thing to consider is that a big quest to relearn how to create magical weapons to kill the "ultimate baddies" would be too much of a ripoff of the original Dragonlance trilogy. I would hope that GRRM would be wise enough to avoid ripping off a relatively well known old property.
Are you a reader of "The Wheel of Time" You can tell there are many inspirations for A Song of Ice and Fire there by Robert Jordan.