Storylines I’d like to explore

Viserys

A storyline where Viserys overthrows Khal Drogo and sacrifices him to birth the dragons due to his dreams. He names the dragons Balerion, Meraxes and Vhagar after the dragons of the Targaryen dragons. He forces Daenerys to nurse his dragons, having learned that breast milk of Valyrians helped them grow larger and faster, and he eventually takes back the iron throne.

Once there, he marries Sansa Stark or Margaery Tyrell, to strengthen relationships between the seven kingdoms. He takes Daenerys as his mistress, until he grows bored of her when he promises her to Tyrion Lannister.

Aegon Targaryen

When Daenerys arrives in Dragonstone and begins her attack on Westeros, her burning of the Tarly’s causes Varys to betray her and reveal that her nephew, Aegon, is still alive and is the true King. Aegon has a dragonbinding horn which he uses to take control of Daenerys’ dragons and takes Drogon as his mount.

He takes Kings Landing easily, and helps his half-brother Jon in defeating the White Walkers, and is the one who kills the Night King. When he returns to take the Iron Throne officially, Daenerys crowns him to show the realm that she has given up her claim for Aegon. Truthfully, she’s his prisoner. He has full control of everything she does and uses it because she can’t be trusted. He marries one of the high born women of the seven kingdoms and takes Daenerys as his mistress, but also forces her to wait on his wife like a servant.