Bowen Yang thinks the “Wicked” series has reached the end of its yellow brick road. When the “Wicked” actor and “Saturday Night Live” star was asked about the possibility of a third “Wicked” film being greenlit, Yang offered an answer that seemed satisfied with how “ Wicked: For Good ” leaves things off. “I think we leave it here,” Yang told Variety’s Marc Malkin during Variety On the Carpet presented by Lexus, before playing along with the prospect of a spinoff. “I’m going to pitch a ‘