The giant stuffed bear, its face a twisted smile, lumbers across the screen. Menacing music swells. Shadows mask unknown threats. Christopher Robin begs for his life. And is that a sledgehammer about ...

Batman was first published in Detective Comics #27 in 1939. Superman in Action Comics #1 in 1938. Mickey Mouse first appeared in Steamboat Willie in 1928, and that version is now in the public domain.