If you could still remember, Zoe Aggeliki's name was mixed into the Johanna Mason casting rumor several days ago along with Mia Wasikowska by The Playlist. Then after that, EW has reported that Mia Wasikowska is not in the running to play the District 7 victor as confirmed by the Aussie actress' reps. EW has also added that Jena Malone is a front runner to play Johanna but Deadline also reported that Zoe Aggeliki is now in negotiations with Lionsgate for the role. According to Deadline:
However, sources say model-actress Aggeliki is the one in the most serious talks after both auditioned for director Francis Lawrence.
Anyway, the fandom is really going crazy over this casting rumors not just for Johanna, Finnick and other characters. I don't know why the people from Lionsgate are very tight when releasing official announcements for the casts. I mean the sequel will be filmed soon so I think it might be a great way to keep the fandom alive if they announce any casting news soon.