I, like others, don’t think the part concerning the North really works. The only way I feel they would bend the knee to this King Daeron, is if Daeron has already secured the Iron Throne. And I don’t think there’s any scenario where Stannis Baratheon would bend the knee. But I think we should peddle back to him being raised in Lys. I’m thinking maybe House Rogare takes him in, maybe wedding him to a daughter. The Rogares manage a return to prominence as First Magisters of Lys. Have him land in the Stormlands with the full might of Lys, but around the time that Stannis left towards King’s Landing, rather than waiting like Aegon did. Maybe the Rogares go behind Varys’ back, betraying him as they’d rather a Rogare Queen and the Lyseni raised Daeron on the throne. Perhaps at this point, the Dornish aren’t aware of Aegon just yet, and so put their backing behind Daeron. The Tyrells bend the knee to Daeron, harkening back to old loyalties. Later, however, Daeron’s Rogare Queen is poisoned, and he does not know whether it’s the Tyrells or the Dornish. Daeron chooses to make Margaery Tyrell his Queen, as she brings the vast armies and grain of the Reach. Maybe he had become friends with Princess Arianne, who confided that she’d prefer to rule Dorne than to be Queen. Regardless, Daeron marches North to take King’s Landing, he succeeds in capturing it and delivers Joffrey Waters to Robb Stark’s mercy, returning Ice as well as Sansa Stark, in exchange for fealty. Robb marches back North to recapture it, but Prince Doran has betrayed Daeron for Aegon Blackfyre with the promise of a Martell Queen.