Is your marriage built on more than mutual beliefs? It damn well should be. Are you worth staying with despite differing beliefs? If your marriage is so paper thin that without shared beliefs it's not worth fighting for, then.... It's not worth fighting for. I say that because obviously if you're talking this way you're not very optimistic.
If you're DFed for apostasy and you're very aggressive in your anti-WT stance, then yes she will be reminded that she can leave you, her relationship with jah is more important. If that's not the case, you're just not interested in the religion anymore and are still a good husband, the elders would be stupid to even bring it up with you.
I'm pretty certain that if the elders floated that idea by my wife, she'd lose it on them. You have to get her on your side, bro. Even if she disagrees with you, she needs to be just as interested as you are in your marriage being a success. If not, what's the damn point? Even if your kids are raised by her to be JWs, they are still more likely to turn out to be Atheists.