According to THR's Heat Vision, Wilde will play Ella, a woman who joins Craig's mysterious gunslinger to fight off the aliens. (Is the gunslinger now mysterious and no longer named Zeke Jackson? Curious.) I'm not sure if Ella appeared in the original graphic novel / web-comic. There was a female gunfighter named Verity who traded bullets with the Apache right alongside Zeke. Perhaps she'll be a variation on that character, or she'll be a pioneer woman with a rifle, or she'll be one of the West's soiled doves like Megan Fox in Jonah Hex. (Cue the fervent wishing of many male readers for Wilde in similar attire.)
Jon Favreau is directing, and Alex Kurtzman and Roberto Orci of every-script-under-the-sun-fame have penned the screenplay with Damon Lindelof. Steven Spielberg, Ron Howard, and Brian Grazer are producing alongside Scott Michael Rosenberg, the author of the graphic novel. Shooting is expected to begin this summer. Between this and Tron: Legacy, I think Wilde may be destined to be summer's geek goddess.