Juneya wrote...
Personally, I don't think that theory makes much sense. Flemeth, in my opinion, did not really want to become the queen of all Ferelden.
So here I'll post my own conspiracy theory: I believe that Flemeth's 'demon' was actually one of the Old Gods speaking to her, and as they had first taught magic to man that Old God taught magic to Flemeth so she could take revenge, which would explain why Flemeth knows magic that was lost since the days of Arlathan (that only a few Dalish Keepers still know) but unlike them, can turn into a high dragon.
Morrigan states that after making the deal with this 'demon' he had made her strong. Normally, an abomination would immediately take over the body of the mage it spoke to, so how could it be that any old demon was speaking to Flemeth? The Old Gods didn't have a way to get out from underground, so they would need another way out: the dark ritual could be a way. Flemeth's deal with this demon could have just been her promise to find a way to bring him back.
Then, the final peice of my lame imagination run wild is the grimoir. You won't catch this detail unless you talk to Morrigan and she tells you what her mother's grimoir looks like: a leather bound spiral with the design of a leafless tree. This back to the opening credits, this very image comes up with while Duncan narrarates, "they were cast out, twisted and cursed by their own corruption. They returned as monsters, the first of the darkspawn." When the Old Gods first tried to escape their prison, their plan had ultimately backfired, as now they were being summoned from their prison to be tainted. Now, thought Duncan is narrarating the history of the darkspawn... think of it as if he were talking about the Old Gods instead. It kind of just clicks.
My theory is probably just a bunch of hogwash, but to be honest, I don't see how Flemeth benefits from having a child of royal blood--especially since women cannot overthrow a king due to their standing in society (I'm being honest here, not sexist. Nobody would kick a male king off the throne, even if he was of royal blood, to put a woman on that is not known by the people). What makes more sense to me when Maric gave her a promise is that he promised to bring the Grey Wardens back to Ferelden. Because I'm a self-absorbed ****** I'm also going to tie this into my theory: Flemeth wouldn't want the world to succumb to a blight, because otherwise, the darkspawn would just raise up another archdemon, possibly her archdemon, and that would just blow. This also explains why she had the treaties: she needed the blight to be over as quickly and cleanly as possible.
This clicked for me too. So when I started thinking about it...that Flemeth's grimoire has the symbol of a leafless tree on the cover and the leafless tree is shown in the opening story to the game, that it's associated with the magisters, yadda, yadda...I started to wonder if Flemeth may actually
be one of the Tevinter Magisters who brought the Blights and the Darkspawn down upon the world. The game implies that they were all men, but it also implies that much knowledge of that time has been lost or purged. So...how do we know that they
were all men? The game says that Flemeth predates the country of Ferelden as the country it is today but that she also predates the Chantry and the Circle of Magi. And if the Chantry and Circle of Magi were created after the Magisters assaulted Heaven...anyone see where I'm going with this? She has power beyond any other mage of the present day Dragon Age and knowledge of magic that predates the Chantry and the Circle Tower as well. And now she wants a Grey Warden to sire a child with her daughter, with the soul of an ancient god, the same gods who...whispered...to the Tevinter Magisters to assault Heaven in the first place.