What we saw being filmed
.We saw Regina facing the vault with her hands held up. (probably casting magic trying to get in)
.Snow approaches and they talk.
.Snow, Charming, Emma, Hook, Henry, Regina, Archie, Granny & Jekyll are all standing in the middle of the road by Granny's diner.
.They were all looking at something above Granny's that we couldn't see so it will probably be CGI.
.Some people working in the diner come out just as the gang run toward the diner.
. Emma is sword fighting with a hooded figure.
.We heard Charming call out "Emma" and Henry call out "Mom
I wasn't here for this scene but I saw photos of it being Emma alone outside Granny's.