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troperville

This is a "Wild Mass Guess" entry, where we pull out all the sanity stops on theorizing. The regular entry on this topic is elsewhere. Please see this programme note.

James Bond Jr

James is actually James Bond Sr's son

Come on! This is James Bond we're talking about. The "nephew" part is just a ridiculous lie probably to keep the boy safe (Not that it works very well)

It's a lie to keep the censors happy.

James is the NEXT James Bond

A popular theory about the film franchise is that its use of The Other Darrin is in fact more of a The Nth Doctor; all those different looking Bonds are completely separate people, with the code name "James Bond" being passed down when one of them dies or retires. And here we have a kid using that name and training as a secret agent while still a teenager. Coincidence? He's actually being groomed as the next replacement Bond.

That explains "Uncle James" teaching him "the game".

Goldfinger is Goldfinger's twin brother

The original script for Diamonds Are Forever had Goldfinger's twin brother out for revenge. This can explain why he is still alive. He's not. It's his brother.