Naturally, nothing has been revealed about the new film's plot. Though presumably, it will spin a new tale following the project that saw Jake Gyllenhaal's character experiencing the last eight minutes of someone else's life during a terrorist attack on a train to try to stop the bombing.
The original film's writer, Ben Ripley, will once again be on script duty for this one, but no casting has been announced, so we don't know if any of the original actors around Gyllenhaal – Vera Farmiga, Jeffrey Wright and Michelle Monaghan – or even the man himself, will return. He's unlikely given that – spoiler alert – it was revealed he was close to death all along (and the timeline was reset in any regard).
As for Foerster, she's a veteran of Roland Emmerich's (Anonymous) films having served as his director of photographer and second unit director. She's also a regular collaborator with producer Mark Gordon, working on TV shows such as Criminal Minds and Army Wives.
Gordon is driving the new Source Code, but with no distributor set up yet, there's obviously no release date to report. As always, watch this space.