I did try to choose both snake but still the same.. but when I try to play a new game there's a yinyang in the middle of the map and it leads me to the island.. but there's characters I don't recognize.. like the one in the bar and suyi and opal.. and I don't remember marrying korra and jenoriya kinda confusingthat seems to be the end, I'm not sure if it has anything to do with slave route, but your choices at the end of the chapter. You cannot deny both spirits if you want to go back and go to the island.