I personally wouldn't base a regrade for an entire film on the colours in a trailer, trailer colours are notoriously unreliable as poita said in the other thread and of course only show the colours of a few scenes, all the other scenes you'd have to guess at what they're meant to look like colourwise.
The trailer looks like it has a blanket blue tint all over it. You can see that especially in the bar scene in the trailer, it looks exactly as I think it must have looked on location when it was shot (ungraded basically) but with a blanket blue tint added to it. If you prefer that ungraded look, which I can understand, you have the problem of not knowing what other scenes not shown in the trailer would look like with the trailer's more neutral ungraded colour scheme. You'd be creating a film with a mismash of graded scenes taken from the blu-ray and ungraded scenes whose colours were taken from the trailer, creating an inconsistent colour scheme overall IMHO.
If you try to transfer the look of the trailer to the entire film I think you're just going to end up with a very blue looking film, which is what has happened with your latest regrade screencaps. The shots in the desert feel very cold in your regrade now and I don't think that's a good idea because it will create a disconnect with the viewer. They feel very unnatural to me.
I think you should discard the trailer as a colour grading reference because you don't have the colour scheme for the whole film. With your regraded shots in post 95 and 98 you were going in the right direction IMHO, they looked natural and very nice to me. I think my slight adjustments make them look even better but you may or may not agree with that. If you really want a less warm more neutral blueish colour scheme though, similar to the trailer, you should probably use the WOWOW release as a starting point rather than the blu-ray, that has a less warm more neutral feel to it overall and you have the whole film with the whole colour scheme, unlike the trailer where you just have a few scenes. Personally i'd continue using the blu-ray though, it feels more 'right' to me for a film shot in that era, even if it is more heavily graded.