Blackbeard's lineage will be very relevant in One Piece. Being able to eat two devil fruits will be related to that.

He wasn’t born Baby Blackbeard – his real name was Edward Teach. 3. Who’s afraid of big bad Blackbeard? Some historians argue that there is little evidence that Blackbeard was a particularly ...

This was clear to the fans right from the very beginning, when Luffy first met him in Mock Town. Clearly, Luffy was able to sense something different about Blackbeard, referring to him as ‘they.’ ...