Now, this one is going to be interesting, assuming it turns out to be true ...
Jena Malone best known for her roles in The Hunger Games and Stepmom has now been rumoured to be appearing in Batman V. Superman: Dawn Of Justice, after being spotted on set recently and of course, dyeing her hair red, it seems the actress is now rumoured to be playing Carrie Kelly, who to comic book readers will be known as the female version of Robin from Frank Miller's comics The Dark Knight Returns and The Dark Knight Strikes Again.
With parts of Affleck's depiction of Batman in the upcoming movie somewhat based on Miller's take on the character, it is possible that Malone could be playing a somewhat older version of Kelly (in the comics, Carrie is a 13 year old girl, Malone is 29) but it's also possible the actress could be playing another character altogether. Either way, it'll be interesting to see if the movie franchise will actually tackle a Robin that isn't Dick Grayson for the big screen.
More Information: http://batman-news.com/2014/10/17/jena-malone-batman-v-superman-dawn-justice-says-hollywood-reporter/
Batman V. Superman: Dawn Of Justice continues to film and will be released in cinemas from March 26th 2016.