These were my thoughts as well.
If this new novel simply lays the groundwork for how Bond became the Bond we met in CR (how he got his licence to kill and inherited the position of 007), then I’d be pleased (provided the story is good of course, and works within the descriptions laid out by Fleming of his two kills in cold blood).
But if this new novel is meant to show us the development of Bond’s personality (particularly as a womanizer), then I’d be disappointed. I like to think that it was the loss and apparent betrayal of Vesper which resulted in Bond’s seeming inability to maintain a serious and sustained relationship-- he never allowed himself to get close to anyone (barring Tracy of course).
In fact, that was my only real criticism of Craig’s CR (2006)-- Vesper should have been the sole Bond girl, with her death having formed Bond into the agent we know and love. Solange felt tacked on to me and completely undermined the importance of the Vesper storyline.
So I sincerely hope Horowitz’s new novel steers clear of this issue. My personal preference: there should be no Bond girl in the novel whatsoever.
That being said, Trigger Mortis was one of my favorite Bond novels, so I’m excited for what’s in store.