I did more research and discovered evidence that Harold Godwinson was likely a descendant of Æthelm son of Æthelred I who should of inherited the throne instead of Æthelred’s brother Alfred the Great. Therefore Harold Godwinson was the rightful King of England. I know about the oath to William the Conqueror’s but since Edward the Confessor was not planning for William to succeed him, the oath should not have had affect on William being his successor.
Harold Godwinson’s heir by primogeniture is Karl von Habsburg. So King Michael in Parallel Hero should be his son. Michael’s Parallel self in this universe is this guy.
https://en.m.wikipedia.org/wiki/Ferdinand_Zvonimir_von_HabsburgJaime ruled the Europan Kingdom from 2015 till his death in 2018. My parallel self realized that Michael was the true heir, and spoke in favor of his succession and thus he became King in 2018, around the time the events of Parallel Hero take place.
So Niam, the information that Michael succeeded to the throne because I discovered he was the true heir should be included sometime in the story.