Board Thread:Spoilers!/@comment-27060727-20160824022100/@comment-27060727-20160826192429

But Blackbeard and Captain Silver were presented as minor characters. Neither were the main guest stars of their episodes. Like in 3x17, it was Ariel. In 5x15, it was Liam. I've always seen Blackbeard as OUAT's version of the cartoon Hook. And other than his name, there was no indication that "Captain Silver" was the man from Treasure Island. He could've been named literally anything else and it would have made no difference. He was just the mean captain of the ship that the Jones brothers were servants on. Those guest characters that you say were ruined never actually got backstories.

However, Captain Nemo most likely will be the main guest star of focus for 6x06 and the casting announcement indicates that he will have his backstory explored. That /should/ make this captain different but we'll see. And like someone mentioned above, Hook might not even be in the flashbacks. Nemo probably comes from a new land (that Hook may or may not have ever visited).