Plot details are being kept under wraps, but the 3,000-year-old world from whence Smith's and Theron's characters came will be explored, with the dynamic duo teaming up to deal with a third ne'er-do-well.
Theoretically, anyway. No contracts have yet been signed, but director Peter Berg nonetheless made the hopefully not preemptive announcement at the Toronto Film Festival this week.
Fingers crossed he doesn't wind up eating those words.
Check out who else has signed on the dotted line in our Casting Couch gallery.