Michael Keaton is the man. He was the first actor to play Batman on the big screen. He won an Oscar for playing an actor who played a bird version of Batman on screen. Now he's almost certainly going to play a birdman on screen in Spiderman: Homecoming. That's a level of destiny usually only displayed by Samuel L Jackson. It's bizarre.
What few people know is that Michael Keaton got his start on Mr Rogers Neighborhood. He talks about it in interviews sometimes and it sounds like working there was a blast. Here is a short documentary narrated by ol' Mr Mom himself. Even if you hate Keaton (because you are some sort of heartless monster) the video is a good way to familiarize yourself with the story behind everyone's favorite neighbor. Enjoy.