A possible crossover could involve the storylines of Gunpowder influencing the religious aspects in Game of Thrones. If the idea of gunpowder and the technological advancements it represents were introduced into the highly religious society of Westeros, it could cause a great upheaval. The High Sparrow and the Faith Militant might see it as a threat to their power and try to suppress it, while others might see it as a new way to gain an edge in the power struggle. It could also lead to new cults or religious interpretations revolving around the power of gunpowder.
One interesting crossover could be a scenario where the political intrigue of Game of Thrones meets the explosive elements of gunpowder from the Gunpowder era. For example, imagine if the houses in Westeros had access to gunpowder weapons. It would completely change the dynamics of warfare. The battles that were once fought with swords and bows could now be dominated by gunpowder - based artillery, changing strategies and alliances. Also, characters like Tyrion Lannister might use his intelligence to manipulate the new power that gunpowder represents, perhaps creating new forms of defenses or offenses for King's Landing.
In a Game of Thrones and Gunpowder fanfiction crossover, the wildlings north of the Wall could get their hands on gunpowder. This would change their relationship with the Night's Watch and the kingdoms to the south. Instead of just using primitive weapons, they could now pose a more serious threat with the use of gunpowder. It might also lead to some of them trying to trade for more gunpowder, which could open up new storylines of diplomacy and betrayal between the different groups.
Chapter 277, "Jiang Yan Really Has a Youthful Vibe", is the clearest early answer because it turns Zhao Lang's situation into a concrete plot event. It opens with After reviewing that document, Zhao Lang's brows knitted together... and closes on He really has been too nice to him..
Chapter 346, "Formidable Soldiers and Brave Generals, One Against Three, Reason Behind the Beast Tide", is the clearest early answer because it turns Hong Tian's situation into a concrete plot event. The setup is Subordinate here to receive the order!" After Hou Quan nodded in..., but the pressure keeps building through Xia Chuan and Yuwen Dao quickly moved three to four kilometers....
Chapter 349, "Attempting to Cheat, East Ridge's Strength, Lu Yang's Tactics", is the clearest early answer because it turns Zhu Tong's situation into a concrete plot event. The chapter gives readers a real answer by opening on The village-level camp pays tribute to Beishuo every six months. and ending on Zhu Tong naturally understands this truth..
Chapter 347, "Mirror Valley Council, Power Surge, Dajue Temple, Eight Battalion Tournament (Part 2)", is the clearest early answer because it turns Cold Resistance Level's situation into a concrete plot event. It opens with Xia Hong stepped into the hall and directly took the main seat. and closes on The existing Cold Resistance Levels in the camp had adequate Yangyuan....
Chapter 120, "Jiang Li Can Actually Do Acupuncture?!", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. It opens with Facing the sudden and somewhat strange request from Jiang Li,...
Chapter 289, "After all, no one else has designs on Grandpa's inheritance but me", is the clearest early answer because Zhao Lang gets a payoff that changes the stakes.
Chapter 208, "Those Who Commit Many Wrongs Will Destroy Themselves", is the clearest early answer because it turns Sister Li's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Jiang Yan clicked his tongue, "What's this about money?
Chapter 93, "Why Consult a Fortune Teller When a Child is Lost?", is the clearest early answer because it turns Aunt Xu's situation into a concrete plot event. Early on, Jiang Li looked back and saw several aunties linking arms, walking up....
Chapter 273, ""Justice Will Eventually Triumph Over Evil", is the clearest early answer because it turns Zhou Xu's situation into a concrete plot event. The chapter turns that into something concrete by moving from Jiang Li, who was reading a book, suddenly jumped in fright.
Chapter 341, "Moao's Nine Garrisons, the Inspection System and Zhenyu, Li Hu and Hong Yuru (Part 3)", is the clearest early answer because it turns Zhu Ling's situation into a concrete plot event. It opens with Of course, just this alone is not enough to deal with He Wuyang. and closes on Not to mention the future annexation of Baisong Camp, just the 24....