All this "the Scions might be the Twelve reincarnated" stuff feels very square peg round hole to me. If we're working under the assumption that the Twelve are also Hydaelyn's summoners, then that wouldn't that discount every Scion except for Arenvald, Minfilia, and Krile? And if we're not, and they were just... some other guys and gals who popped up after Hydaelyn sundered the world, what does it matter if some of them might have reincarnated into the likes of Thancred, Y'shtola, etc.?