This is Adam and Eddy we're talking about. ;p
They seem to eschew the timeline from time to time, so who knows? Regardless, Marian is a little bit off. I kept thinking that if Regina wanted to kill her to make a point to all of those villagers, she would have done it right in front of them. Why take her back and make her a prisoner just to burn her in private later?
I just can't imagine they would kill off Marian. That would start Robin's mourning process all over again. He'd look like a total asshat if his wife died (again) and then he went running into the arms of Regina a few days later. That's why I think she's evil.
I am also super curious about this hat. Will we see Yen Sid or is this just another role they're going to hang on Rumple? He is already Rumplestilskin, Peter Pan's son, Fairy Godmother, The Crocodile, The Beast, etc.