 Most of the series cast will be reprising their roles, except Thomas Sangster as Ferb, who will be replaced by David Errigo Jr., who previously voiced Ferb on "Milo Murphy's Law".According to Jim Bernstein, the film is unrelated to the theatrical "Phineas and Ferb" film in development.In 2012, it was announced that a crossover between "Phineas and Ferb" and Marvel Entertainment, would air in the summer of 2013, titled "Phineas and Ferb