Because so many gays have gotten married in states where laws and constitutional amendments preventing SS marriage were overturned by black robed tyrants, I fear the SC may just rule that the ship has already sailed and side with them by default.
That’s what I think will happen, for mostly the same reason. The rest of the reason being that not enough of the SC even actively opposes it, on any ground, and enough of them actively support it, and will always vote ideologically.