Rumors are circulating about the casting of the X-Men in the Marvel Cinematic Universe ahead of San Diego Comic-Con. Some outlets are reporting on potential leads for certain characters, including Cyclops and Emma Frost, as well as possible involvement of actors such as Dwayne Johnson and Sydney Sweeney, although Sweeney is now said to be out of the running. The Marvel boss has officially responded to the casting rumors, but details about the reboot and its cast remain unclear.