Once Upon a Time has been teasing us with the depth of Zelena's wickedness, and based on the promo for next week’s Season 3, Episode 15 (“Quiet Minds”), we might finally get to see her unleash her powers in a big way.

What should we expect from the episode? We've taken a closer look at the promo to see what it reveals about Sunday's adventure.

1. Rumple running. The promo opens with Rumple running through the woods. It's a human looking Rumple, so we're pretty sure this shot is from the present. We know he's out of his cage, and this makes it look like he’s managed to escape and is on the run.

2. Zelena summons him. One problem: As we learned this week, Zelena has somehow gotten her hands on Rumple's Dark One dagger. At :04, she summons him. Based on everything we've seen about the dagger and its dark one curse in the past, Rumple will be forced to come to her.

3. Neal's back! Neal fans, rejoice! Or, maybe don't. He's back this episode, but at :07 he appears to be in a lot of pain. In fact, he collapses — in front of Emma. Well, at least we know he's made it to the present some how. So much for the theories that he died back in the year that was lost…

4. Regina being awesome. "Show yourself you winged freak," Regina demands at :08. We love snarky Regina!

5. Flying monkey attack! Speaking of winged freaks, the flying monkeys are back at :10. Fun times.

6. Emma and Charming find Rumple? Something else worth noting from that shot at :10 — unless we're highly mistaken, Charming and Emma are protecting none other than Rumple himself. Fantastic. We're excited to see him back with the rest of the group, even though (or perhaps because) he's a bomb waiting to go off thanks to Zelena's control over him.

7. Neal at Gold's shop. At :12 we see someone trying to break into Gold's shop while Belle and Hook look on in worry. But at :13 it turns out to be Neal, who once again looks like he's in bad shape. What is going on with him?

8. Symbols, and magic, and snow, oh my! At :13 there's a shot of some sort of giant circle covered in what look like occult symbols and it's snowing. At :14 there's a shot of what appears to be Neal scrambling away from it as it glows, while Belle looks on. Then at :15 there is Rumple, looking like the Dark One, in the snow — a flashback, we presume.

9. Action! Action time from Charming and Emma! At :16 we see Emma on the phone, looking shocked, and at :18 she and Charming break down doors. We love all the father-daughter time this season!

Did we miss anything important? Interpret something wrong? Let us know your thoughts in the comments below!

Catch the next episode of Once Upon a Time on Sunday, March 30 at 8 p.m. ET on ABC.