I never considered Casino Royale an “origin” story. Origin stories explain some ability or motivation that needs explaining: why does a rich playboy dress as a bat to fight crime? How does a guy end up with a metal skeleton and retractable claws? There’s nothing in CR to explain why Bond takes up a life as an assassin or why he’s particularly good at it: he just does and he just is.
Dialog makes clear he hasn’t been in the section long, but as noted upthread we can assume he’s killed before in his military career and he’s already pushing 40 when we “meet” him. Did he volunteer for the section or did M draft him? We don’t learn that either.
What about Bond even requires an origin? What’s his superpower? Basically it’s that he’s so good at everything he does. How do you “explain” that? Either you go with the magical explanation (“Because he’s James Bond, duh”) or the prosaic one (“Well, he went through years of intensive training and study…”) The first explanation only works if we just accept it without question, the second would make for the dullest film ever if we had to sit and watch the whole process. Personally, I vote for Option 1: Bond has impossible skill and luck and that’s why he’s an aspirational figure. How is it Arthur could pull the sword from the stone? Was it because of his years of training in the art of sword extraction? No, it’s because he was friggin’ Arthur. 'Nuff said.
Anyway, CR seems to want to explain how it is that a ruthless killer can also be cultured and sophisticated with impeccable sartorial taste and an appreciation for the finer things. But this “tension” only existed back in the Connery years, when we had lines like " I’d say it was a 30 year old finé indifferently blended, Sir,…with an overdose of Bons Bois." It was funny to hear that coming from a tough guy like Sean who obviously didn’t have an effete, pampered bone in his frame, but it was played for laughs and pretty much unique to Sean. Once he moved on, it arguably never mattered again: we could accept Roger, Tim and Pierce, to varying degrees, as legitimately upper class, cultured fellows who also had no issues with killing. Craig’s iteration doesn’t ask why would a jet-setting smoothie kill, but comes at it from the other direction: how does a born killer and roughneck develop a surface “polish” and style? Which is interesting – if inverted – but does that qualify as an “origin”? I mean, I guess I always imagined he preferred his martinis a certain way because he tasted a “shaken” one somewhere and liked it: now we know it’s a reminder of Vesper, which is nice, but couldnt’ that have been just as easily established with a couple lines of exposition in another film?
The kills at the start of CR are the ones that make him a Double-O but are they the first he’s ever committed? It seems unlikely. Dryden says the second kill is…(we assume he’ll finish with “easier”) and Bond confirms it is, “Considerably.” But I don’t take that as the second being easier to live with or reconcile emotionally. The first one involved a lot of sweat and cuts and bruises in a fairly evenly matched showdown with a fit young killer in a men’s room, while the second involved shooting an older man from across the room without Bond even having to leave his chair. So yeah, physically it’s easier, but is it “easier” because he has less trouble sleeping at night than he did after the “first” one? There’s no indication that’s the case. He’s already a cold-blooded killer when we meet him, so how’s it an “origin”?
Maybe the “Vesper” romance is supposed to be an origin, as in “Why is it Bond is so callous and superficial in his liasons? Must be because he had his heart broken.” Except before they’re even a couple, Bond makes it clear to Vesper that he’s historically only been interested in married women, which implies pretty strongly that he already has serious issues with commitment and is just in it for the sex. So again, no origin.
Jump ahead to SF and we learn he had a lousy childhood. Does that count as an origin? No, his folks die in a climbing accident, and it doesn’t launch him on a one-man war against mountains.
I don’t know, I just feel like the more you dig into Bond, the less there is to find, and I wish they’d let it go. We haven’t had an “origin” and we don’t need one, but we also don’t need another film showing his “first week on the job.” Just give us a Bond who already knows his stuff and if you want to make him interesting, withhold information.