Not only did Elvis Presley co-star with future Batgirl Yvonne Craig in two films (It Happened at the World’s Fair in 1963 and Kissin’ Cousins in 1964), but in the 1963 film, he shared a scene with both Ms. Craig and Olan Soule, who would go on to do the voice of Batman in the Filmation animated series from 1968-1970 and on the Super Friends series for many years (in addition to voicing the Caped Crusader in a couple of episodes of The New Scooby-Doo Movies).
Batman used to brandish a gun in the olden days. You can see this in Detective Comics #35.
The name Bruce Wayne comes from two historical figures: Robert Bruce, who was king of Scotland in the early 1300s, and Mad Anthony Wayne, who was a general in the American Revolutionary War.
Source: Bill Finger in Bob Kane’s book Batman and Me.
Here’s the original quote:
“Bruce Wayne’s first name came from Robert Bruce, the Scottish patriot. Wayne, being a playboy, was a man of gentry. I searched for a name that would suggest colonialism. I tried Adams, Hancock … then I thought of Mad Anthony Wayne.”