Q: If Subaru didn’t exist, then would the Royal Selection candidates be facing a future where they couldn’t avoid being wiped out? Or with two camps missing, would the Priestella assembly itself not have occurred?
A: Emilia and Felt would die in the capital, Crusch would die attempting to fight the White Whale, and it would be a Royal Selection that began with appropriate replacements for Emilia and Felt; Anastasia or Priscilla would become the king. The Priestella assembly might happen, but the witch cult attack would not.