This is a topic I've been thinking about for some time.
Our 24 (and counting) Bond films have loads of characters-- villains, girls, allies.
Yet, I sometimes get the feeling that certain characters would have been enhanced if they had been another, already-existing character in the franchise.
If I am being unclear, I'll give you three examples:
1) Pola Ivanova should have been Anya Amasova-- Okay, this one may not fully count because apparently my wish was fulfilled in an earlier draft of the script. Regardless, in AVTAK, Bond meets up with a sexy Soviet agent that he has a history with-- clearly someone whose path he had crossed before. They have a steamy encounter in a hot tub, as Bond tries (and succeeds) at retrieving Pola's recorded tape of Zorin. It would have been a nice nod if, instead of Pola Ivanova, the character was Anya Amasova from TSWLM (I'd have even been okay with Fiona Fullerton still playing the part in place of Barbara Bach).
2) Paris Carver should have been Sylvia Trench Carver-- In TND, Bond reunites with an old flame, who is now married to the film's villain, adding a new layer to the typical Bond girl formula. I think the character could have resonated more with fans had she been a prior Bond girl, as the name Paris is meaningless to longtime aficionados. What if-- just hear me out-- Elliot Carver's wife was Sylvia Trench from DN and FRWL? Nothing (other than her name) would need to be changed. Heck, when Bond asks, "was it something I said?" and she responds with the "how 'bout the words 'I'll be right back'?", it would have been a great nod to fans, as abandoning Sylvia for his job was precisely what Bond did on those two occasions. "This job of yours is murder on relationships." It would have gone completely over the heads of the vast majority of the audience, but Bond fans would have appreciated it immensely. (This is much better than the types of winks and nods prevalent in the Craig era.)
3) Craig Mitchell should have been Villiers-- Just after the title sequence of QoS, M's bodyguard tries to release Mr. White and kill M, leading to an epic chase through Sienna. "We have people everywhere." Indeed, having M's personal bodyguard (for eight years!) be a mole should have carried more weight than it did. What if, instead of creating a character named Mitchell we have never seen or heard of before, the character was instead Villiers (M's secretary) from the previous movie? We already know that Villier's globe-trots with M (accompanied her to the Bahamas in CR), and having him serve as the mole in MI6 would not only have carried emotional weight (we had seen him throughout the previous film), but also would have explained what exactly happened to him. As things currently stand, we have no idea what happened to Villiers after CR. Disposing of him this way would have also been a nice transition to Bill Tanner-- who essentially plays the Villier's role throughout the rest of QoS anyway.
Anyway, those are three I would suggest, each of which I believe would have greatly enhanced their respective characters.
Which Bond characters do you wish had been consolidated into one?