I've come across a couple more editions of Superman (1941):

captures = Main Menu * Production Opening * Title * "The Mad Scientist" * Production Closing

The Superman Cartoons Of Max & Dave Fleischer

by Image Entertainment (DVD disc files dated 1998)

(closing only at DVD's end)

A Fleischer Studios Cartoon - Superman -- 9 Fabulous Episodes :: 8 Fabulous Episodes

by Delta Entertainment (DVD disc files dated 2003)

And here is what those DVDs show on possible edited dialogue:

Image Entertainment DVD 1998
• "... truth and justice ..."
• "Chief, don't you think that's a dangerous mission?" [fadeout over "that's a dangerous mission"]

Delta Entertainment DVD 2003
• "... truth and justice ..."
• "Chief, don't you think that's a dangerous mission?" [fadeout over "that's a dangerous mission"]