Director McG has spent the past year or so in 2018 with Terminator Salvation, and now according to Production Weekly he has signed up to direct a film set way back in the past.
McG is attached to direct Medieval, a spec script by Mike Finch & Alex Litvak, described as The Dirty Dozen set in medieval times.
That is all of the information that has been released so far. McG is also set to direct 20,000 Leagues Under The Sea: Captain Nemo for Disney, and if all goes well, Terminator 5. This means we probably won’t see Medieval for a year or two.