You’re right. It’s not the SB cemetary. It’s the UW cemetary.
IF this is UW cemetery, means that they are still in UW.
Since little John and Merida how can we know for sure if this is 523? this can be 521 and Merida actress words that she would film for the finale were just to make people confuse or maybe she ment final epsiodes and not necesary season finale, of course that she can think this is the finale bc she is not paying attention how many epis the season has and maybe bc of some reason Little john and merida and roland end in UW, maybe just like Belle ends there, they also end going to UW and this is actually episode 521, that would explain this being a vision of hades to make Regina suffer.
"I offended you with my opinion? Ha, you should hear the ones I keep to myself".