‘Avengers: Doomsday’ Star Alan Cumming Says ‘I Don’t Fully Understand the Plot’ and Only Acted With Florence Pugh’s Stunt Double

Alan Cumming is starring in “Avengers: Doomsday” but told SiriusXM point blank: “To be honest, I don’t fully understand the plot.” Not that Marvel allowed the returning “X-Men” star to read the full screenplay to the comic book tentpole, but even filming his scenes left Cumming with zero clarity on…