I wish I could say with anything resembling certainty that she'll come around and everything will be wonderful, but unfortunately no one can. But by the same token, no one can say that things won't get better. Just make sure to include her. Things like going to therapy with her a part of it, maybe she will be able to see exactly how much it all matters to you and is part of something so core to who you are as a person.
What I'm trying to say is... don't give up hope. Not for yourself, not for your marriage, not for transitioning, and not even transitioning while maintaining your marriage. Tomorrow things may be the same, they may be worse, but they could also be better, perhaps even a lot better.
And maybe it's naive of me, but I believe those who truly love us will ultimately seek to do what is right by us, just as I hope we would seek to do what is right by them. What form that may take, who knows... But, yeah... just, don't give up.