I suppose this counts as a plot idea...
This will probably be clearest to readers of the Incarnations of Immortality series by Piers Anthony.
For those of you who have not read it, you should, but here's the general idea:
There are incarnations of Death, Time, War, Earth/Gaia, and Fate (3 of them). They perform specific functions related to their "offices." Death collects souls of the dying, Time makes sure no one messes with the flow of time, War makes sure that wars happen properly and when they need to (or stops those that don't need to), Earth/Gaia controls the seasons, the weather and all those pesky natural functions, and the three fates spin, measure,cut and weave the threads (read: lives) that make up the tapestry of humanity.
It was my thinking that these are people who would fit in well in the mythic age. Even better is if they were dragons (since dragons are cool like that and are better suited to handling these things.)
Now, imagine that you are a scion. Imagine that you are having flashbacks where you are collecting the souls of the dying, or weaving fate, or presiding over wars... what were you? Now suddenly you seem to be manifesting powers that you don't understand, your only clues being your visions, dreams and flashbacks. What's going on?
I thought the Incarnations would make an interesting brood, and also that a whole world of plot opened up for a brood of scions who are rediscovering who they were- and what they did. Toadd to the mix, anyone or anything that recognized the scions for what they were (and are now becoming again) would also recognize their power, and may be very interested in manipulating them.
Just some food for thought. Sorry it isn't the most coherent bit of writing, but hopefully its enough to give you the general idea, and perhaps some ideas of your own.