It’s official! Polonius actor Oliver Ford Davies told the Telegraph:
"We are intending to film it over two or three weeks in June. It won't be a full feature film as there isn't time but it will certainly be more than just the filming of the stage. It will be fantastic to work together again."
As I’ve mentioned, I don’t really know anything about David Tennant, but his Hamlet got rave reviews. If it is only half as good as Lear was, it’ll still be jaw-dropping.