The Next Phantom? Add the name of Broadway actor David Cryer as speculation mounts about who will succeed Michael Crawford in “The Phantom of the Opera” at the Ahmanson at the end of April. Cryer’s agent Allan Willig said he wasn’t ready to announce his client’s casting when approached by a reporter Wednesday. But Thursday his office stated that Cryer, who played Juan Peron in the Broadway company of “Evita,” would not do “Phantom” in Los Angeles. Meanwhile, a spokesman for producer Cameron Mackintosh confirmed that Cryer was among the names being considered. Other speculation has included “Aspects of Love” star Michael Ball. And the guessing game continues. . . .