Oda may have foreshadowed the events of the Marineford Arc in a subtle way

(Marineford arc spoilers, obviously)

Pardon me if this is a tired old theory. I'm sure I'm not the first to make the connection, but I couldn't find anyone else talking about it, so I decided to share here anyway.

So, towards the end of the Marineford arc, Blackbeard steals Whitebeards devil fruit. I believe this event may have been foreshadowed by their names.

Blackbeard is named Marshall D. Teach, and Whitebeard is named Edward Newgate. In real life there was a pirate called Blackbeard too, and his real name was Edward Teach. Which is essentially a combination of Edward Newgate and Marshall D. Teach.

So I think Oda subtly hinted that Blackbeard was going to end up with Whitebeards power, because combining the two of them is sort of a metaphor for him truly living up to the name of Blackbeard.

This could also be fuel for the theory that Blackbeard is multiple people, that he's now literally both Edward Newgate and Marshall D. Teach in one body, but at the very least I think it was Oda's little wordplay way of hinting that Blackbeard was going to end up with the powers of both Edward and Teach.