Jim Carter’s in the most recent Transformers movie The Last Knight and has other big screen projects in the works.
The casting issue is doubtless going to be the biggest for Downton Abbey.
All of these people likely have time somewhere in their schedules to film a Downton Abbey movie, but it’s getting people together around the same time that could be the logistical problem.
Elizabeth McGovern is doing a PBS Masterpiece film with Downton Abbey’s Julian Fellowes called The Chaperone.