IOTL, one of the reasons the Kalmar Union came about was the death of Christopher, Duke of Lolland, the only surviving son of King Valdemar IV of Denmark. He was in fine health until 1363 when he fell ill and died. Some sources write that he was injured during the Battle of Helsingborg and suffered a mental disorder.
Christopher was between 19 and 22 years old when he died, and his father would outlive him by 12 years. That's old enough and time enough to father children of his own with, say, Catherine of Bohemia (https://en.wikipedia.org/wiki/Catherine_of_Bohemia), if Rudolf of Austria still dies on schedule.
If Christopher isn't injured or take ill, how might Denmark be affected by the continuation of the House of Estrid in the male line?
Christopher was between 19 and 22 years old when he died, and his father would outlive him by 12 years. That's old enough and time enough to father children of his own with, say, Catherine of Bohemia (https://en.wikipedia.org/wiki/Catherine_of_Bohemia), if Rudolf of Austria still dies on schedule.
If Christopher isn't injured or take ill, how might Denmark be affected by the continuation of the House of Estrid in the male line?
