His just out of rehab daughter (Emma Stone) screams at him that he doesn't even have a Twitter account or a Facebook page, therefore his existence is nil. His love of self prevents him from giving her any credibility or feeling the love standing right in front of him. She sets up a Twitter account for him which garners over 80,000 hits. If Riggan had only listened to her, he could have self-actualized with selfies and lived online into perpetuity.
The voice follows Riggan down narrow and twisting backstage hallways that are shadowed and not so clean. It quiets only when he is onstage. There he wrestles with dramatic egos other than his own. Lesley (Naomi Watts) is happy to finally be on Broadway and is not about to have the experience ruined by her boyfriend Mike (Edward Norton), who eerily echoes Riggan's vacuousness regarding love. His method acting means he's impotent except onstage. Riggan's lawyer and manager, Brandon Vander Hey (Zach Galifianakis) is a practical breath of fresh air in the stale oxygen residues left behind by other people. Cinematic, albeit satirical, references to superheroes and the actors who played them abound. At one point, Mike wonders if they'll replace him with Ryan Gosling. This is after he's flashed his six-pack for the viewer.