Yeah all the season finale (523) shots we have are in SB and we even have Regina, Emma, and (Snow? Hook?) and one of the brothers driving into SB in the Yellow Bug. And then we have post-driving into town shots.
To explain this more clearly, here is how things seemed to go down:
1) Zelena opens a portal door for the Camelot crew and Merry Men to return to FTL. However, something goes wrong, causing Zelena, Snowing and Hook to get sucked in as well.
2) For whatever reason, Henry, Violet, Rumple, Emma and Regina end up in NYC.
3) Zelena, Snowing and Hook return to the real world via a portal in a NYC fountain. They’re accompanied by Nathaniel, who I would guess they met in the other realm. They are then reunited with Emma, Regina and Henry.
4) They all drive back to SB, with Nathaniel tagging along.