Technically, this is the third in a "Blair trilogy," but according to Variety, "Screenwriter Peter Morgan has started work on a sequel to The Queen, which will dig into former U.K. prime minister Tony Blair's relationships with U.S. presidents Bill Clinton and George W. Bush." The article continues:
The movie will focus on Blair's reaction to the handover of power between Clinton, a natural liberal ally, and Bush, who came from the other end of the political spectrum.
Morgan initially considered tackling the more obvious drama surrounding the run-up to the Iraq war, when Blair fatally compromised his own premiership by his whole-hearted support for Bush's invasion plans. But in the end Morgan decided that the roots of those events lay in Blair's difficult adjustment to the transition from Clinton to Bush a few years earlier.
Morgan's trilogy started with the telepic The Deal and continued with The Queen, which won Helen Mirren an Oscar for her depiction of Queen Elizabeth II in the aftermath of Princess Diana's death. No word on whether she'll appear in this third film, though Michael Sheen is expected to reprise his role as Blair.