One House of the Dragon season 3 change might have inadvertently led to Daenerys Targaryen being erased from existence

Key Points:

• In House of the Dragon season 3, the Battle of the Gullet results in the death of Jacaerys Velaryon, but the show omits Rhaenyra's two youngest sons, Aegon and Viserys, from the battle, diverging from George R.R. Martin's book Fire and Blood.
• In the book, Viserys is kidnapped and eventually marries Larra, making Daenerys Targaryen a direct descendant; this change in the show could theoretically erase Daenerys and Jon Snow from the timeline, since Jon is also descended from this lineage.
• Showrunner Ryan Condal explained the changes were made to compress the timeline and keep the children younger for practical and safety reasons during complex action scenes, leading to the omission of Aegon and Viserys from the battle.
• Despite the divergence, the show likely intends to reconnect Viserys and Larra in another way to preserve Daenerys and Jon's existence, as Aegon and Viserys are still shown heading to Essos to be fostered.
• The changes come amid tensions between Martin and the show's creators, with Martin criticizing deviations from his work and describing his relationship with Condal as "abysmal."