Unfortunately,maple doesn't change much.I have owned some '50's Bear bows with maple in them and they were a shade darker than new but still very light.I have a recurve with very cool quilted maple limb veneers and it just hasn't changed in the few years I've owned it.Some spots I hunt,it would be a good color,other places I wouldn't use it because it would stand out too much.
I wish I had good news for you but I just don't think it will change much.Maple is a dense wood and not as easy to stain as some.I bet it is beautiful.