Under pressure, the LDS hierarchy will cave, as will many Catholic bishops and evangelical pastors.
I do believe this will come to pass, though how prevalent obviously remains to be seen...at any rate, church leaders must be aware of renegade priests and pastors looking to make social statements, and then make the choice; punish or accept their dissidence...
I suspect the LDS will fling open the doors to polygamy when/if the SC rules such “unions” legal.