I think it was verified in an earlier article that Zelena coming back in a flashback.
It was. But the issue is that they never said that it wasn’t present day Zelena in the past, like Hook and Emma were in 322. The fact that they said they have a fun little story with Zelena that they put into place last makes me think that Matt might on to something with regards to Marian as Zelena. I hate and loathe this idea, just for the record.
I’m telling you…Zelena’s ashes turned to dust and was swept away along with her magic that transported her back to the past. It explains why Zelena is green, and with no pendant, and why she is consulting with Marian. Marian really died on the job as Robin Hood had thought she did, and Zelena took on her appearance, and just so happened to be right where she knew Regina would come traveling. Isn’t it just so coincidental that Marian was in a village rather than at the Merry Men Camp where her husband and son is????
"If you go as far as you can see...you will then see enough to go even further." - Finn Balor