Also, it is important to remember that most of the fetishes you mention were not something developed post starting transition, they were sublimation or attempts to find an answer to one's problems during decades of repression of the issue. Essentially, in most likely the majority of instances, transitioning is the "cure" (not the right word, but just as a turn of phrase) not the cause. If your spouse has not shown any inclination towards those sorts of things in the past, I would wager it is unlikely they will suddenly take them up now. (Well, at least because of transitioning. Of course sometimes people figure out fetishes later in life, but that is independent of the trans issue and can happen to anyone.)
On the orientation change issue, while there is debate in the role of hormones causing physiological shift, anecdotally if it does happen it is exceedingly rare. What is common however is that people have repressed their attractions as part of their overall repression. But again, this isn't caused by transitioning, it is a preexisting condition that was simply unacknowledged. That is definitely something to talk to your spouse about, but keep in mind that even then it is nowhere near a sure thing this is the case. It's hard to offer anything but anecdotes, but by and large the trans women on this site who were married to women before transitioning are exclusively attracted to women. (Or at the most, lightly curious but without any desire to actually go through with sleeping with a guy, at least as long as in a relationship.)