If it was a valid marriage when entered into and when the green card was issued and the couple is still married at the time of filing the I-751 petition, then there's really nothing at all to worry about or prepare for now, until it's time to file the petition.
Sure, we've always intended to spend our lives together, but I've heard various advice like making sure to more fully merge one's finances, put the spouse's name on bills, etc. and wondered more about that and whether there's any indication that Trump's rule might be bad for non-working spouses, even if the couple's overall finances are very healthy.
