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After QOS I´m dying to say that it would be just perfect if White turned out to be the head of Quantum.
The guy is just so creepy, and he is older and wiser (taking of the receiver out of his hear while the others just stood up and left).
IMHO it would be cool because:
1. He is one of the first bad guys we see in CR.
2. He as a ghostly like presence, always turning up in all the places: Africa, Venice, Austria, ...
3. He says "My Organization" in CR and Bond captures him at the end of the film, they have him in QOS. I mean, wouldn´t it be ironic?
4. Quantum kills every one of their rats. But White was captured, maybe he talked, but they don´t kill him.
5. Le Chiffre says "Tell them I´ll get the money", that actually destroys the possibilities of White being the Big Boss doesn´t it? But what if Quantum is a cooperative identity i.e "them".
6. Mr. White would just be so perfect as this new age sinister Blofeld.
7. He´s just a fantastic actor. Just hear that creepy laughter and the delivery of his lines, awesome.
I do agree that Jesper Christensen / Mr White is interesting, and would be welcome to return for a 3rd outing. But I'm not sure I can imagine him as the head of quantum...
Some "shallow" arguments are against it:
1- he does the dirty job (killing Le Chiffre), which is usually not a feature of a CEO
2- he travels too much and follows too closely to be the real head
3- he talks about "his organization", but so do I, and I'm not the boss
More seriously, I'd prefer if Quantum hadn't
one head, but was a kind of consortium, of network,
à la Al-Qaeda. This would be a more contemporary approach. But anyway, Mr White, as a significant member, could still lead Bond to the top consortium, and play an important part.
For all these reasons, I would rather see Mr White as a "senior executive" (or "senior executioner") of Quantum, the one charged with dirty work, balancing the accounts and "cleaning" things. This would also explain why he wasn't killed but freed: he's head of the Quantum equivalent of "SMERSH", so his own men took care of him (and since they acted pretty fast after his capture, the real bigwigs of Quantum didn't get the time to order Mr White's execution (saved by the bell, if I may
)