You are correct, and very few know the history. This is what I had on it. It is cross referenced in Proclaimers Book so not completely obscured...
A public talk titled "The World Has Ended; Millions Now Living May Never Die" was first delivered on February 24, 1918 in Los Angeles, California. Just five weeks later, on March 31, 1918 the title was changed to indicate absolute certainty and the word "May" was substituted by the word "Will". So the new title became "The World Has Ended; Millions Now Living Will Never Die." The public talk continued to be delivered under that same title until 1925. The material in that talk was published in 1920. For decades Jehovah's Witnesses believed that they would never die in this system and that they would simply pass on into a righteous new earth. Now, of course, that belief has been dropped and it is considered "old light."