The executive producers both recently sat down for an interview with TV Guide to discuss what is in store for Sunday's all new episode and the rest of the season. This is the summary for this episode:
With Rumplestiltskin as her slave, Zelena challenges Regina to a fight to the death and shocks the Evil queen with the reveal of these familial connection, and the town lays Neal to rest. Meanwhile, back in the past in the land of Oz, a jealous Zelena asks the Wizard to send her to Fairy Tale Land after discovering that she has a sister, Regina, and that Rumplestiltskin is training her to become a powerful force to be reckoned with.
Horowitz spoke about Regina and Henry's relationship when talking with TV Guide.
"She will play a role in the attempt to get his memories back," he said, though he did not say for sure whether Henry will actually get his memories back.
Kitsis teased the fact that viewers will soon see Zelena's father, he will be on the show this coming Sunday.
"In fact, you will meet Zelena's father and find out the answer to who the Wizard is this weekend," he said. As far as whether or not "Wonderland" plots and characters will find their way into "Once Upon a Time," Horowitz gave a definitive answer.
The story of "Wonderland" was always meant to be an one-year, close-ended tale. That tale is coming to a close and we're not going to be continuing those story strands on Once Upon a Time," the executive producer said to TV Guide.