Total Geeks claims that Tatiana Maslany got the role we heard that she (and several other actresses) were testing for last week in the Gareth Edwards’ standalone Star Wars film. They also say that she’s the lead, and noticed that Maslany has recently withdrawn from an off-Broadway play “due to film scheduling conflicts.” (The only upcoming film on her IMDB at the moment has already completed shooting.)
UPDATE: The Mary Sue is backing up the original report with a source of their own – but I don’t expect official word will be quick. UPDATE #2: She’s also been cast in an indie film that begins shooting mid-March, per The Wrap. It’s not necessarily a deal-breaker if the spin-off begins filming in May ala The Force Awakens, as it’s likely the ‘February’ we’re hearing is for crew.
We still know very little about this film, aside from the ongoing scripting choices – and a lot of rumors. Hopefully that changes when filming begins soon, maybe as early as February, but likely not until spring.