This is an edit to Part 41 based on latest information I just received.)
Upon knowing the whole history as well as hearing the final recordings of Dyras, the Roger crew all cried. There was 0 laughter unlike what was recorded in Oden's Logbook.
The first part of the final page of Oden's Logbook contains the following words:
"We set foot on the final island that lies beneath the sea thousands of feet below. But alas we were too early and the King's Keys are not yet ready. We were not able to proceed further."
The Roger's Crew left the island of "Laugh" Tale without knowing what the One Piece actually is.
Oda is fucking insane, dude foreshadowed a major plot point through a funny oden moment.
Every time that oden talked about the roger crew laughing, they were actually crying.