1. Part 41:-
2.  
3. Laugh Tale and Gol D. Roger
4.  
5. Upon setting foot on the lost island of Laugh Tale (or what's left of the Ancient Kingdom), among many things that they saw, one of the things is an ancient (his)story of the Ancient Kingdom. From the birth of the civilisation there, the people living there, the struggles they faced, the new technologies discovered, and the fall of the civilisation. All these are stored in an ancient "snail" - but is a robotic one.
6.  
7. At the end of the recording, as Roger is about to walk away, the recording lit up again. It is the last message recorded by Dyras. Dyras is "directly" talking to Roger. He spoke of his tales during his travels, and the friends he made.
8.  
9. Dyras also spoke of destiny, fate, and dreams that connect people across time. As long as there are people who seeks freedom, as long as there are people who are enslaved, there will be things and people who will be connected/linked (?).
10.  
11. Towards the end of the recording, Roger laughed. However, as he sailed away later, he mentioned to his crew that he is also filled with regrets because he is unable to see a world where freedom is the norm. He wished that he could have lived during Joyboy's time and shared a sake or two with him.
12.  
13. Dyras also mentioned a boy from the future. A boy carrying a strawhat representing the coming of the dawn. He will be the one carrying all the weight of everyone across the thousand years and saving everyone from those who represent the opposite of what freedom truly is.
14.  
15. With this in mind, Roger lit up the fire of desire at his execution.
16.  
17. Part 42:-
18.  
19. Red Leg Zeff and Queen the Plague (Note that this backstory will most likely not be shown in anime or manga)
20.  
21. For those who can't remember who they are - Zeff now resides in East Blue (Baratie) while Queen resides in Grand Line and is an idiot.
22.  
23. They are brothers who grew estranged from each other due to differences in values, with the most prominent difference being that Queen attacks women without any qualms.
24.  
25. Their mum's death played a part in them separating from each other during their teenage years.
26.  
27. Anyhow, this is the origin of how and why Zeff never hit a woman. And thereafter, passed this value to Sanji.
28. Part 43:-
29.  
30. The Fishman Island, The Sea Forest, Joyboy's Promise, The Tree of Eve, and The End of All Devil Fruits
31.  
32. 900 years ago, before the destruction of the ancient kingdom as well as before the great flood (see Part 7), the sea level was drastically lower.
33.  
34. Fishman Island - The Sea Forest
35.  
36. The Sea Forest was originally a land forest 900 years ago. Due to the flooding, sea level rose drastically and consumed the whole of the land that is now known as Fishman Island.
37.  
38. Joyboy's Promise
39.  
40. The promise made by Joyboy was not to bring the whole Fishman Island up 10,000 feet above to the Sun. The promise was to destroy the Red Line and bring the water level down back to the original level so that the Sun directly shines on the people who dwells at the Fishman Island. However, without the right people and right items, Dyras was not able to do so. This is one of the biggest regrets he holds in his heart, for which he apologised to the Poseidon Agashi ~800+ years ago.
41.  
42. The Tree of Eve
43.  
44. The Tree of Eve was not originally that tall. However, in the centuries being buried under the sea, it has never die. However, it continuously seek the sunlight and over nearly a thousand years of seeking the sun, the Tree of Eve has grown ever so tall.
45.  
46. The End of All Devil Fruits
47.  
48. At the end of One Piece, there will no longer be any devil fruits power. The reason for devil fruit users becoming a "hammer" and sinking whenever they touch the sea is not because Mother Nature hates them (Edit: what I mean is that the true reason is not as simple as "because Mother Nature hates DFs" as per what VP said) or because of any random "anime logic" - the true reason is because of the eternal yearning of the "fruits" wanting to return back to the original soil/land that is thousand of feets below the current sea level. All fruit users have an innate yearning to go back to where they are "born", an innate intuition that has been lost to time.
49.  
50. Note:-
51.  
52. I purposely exclude talking about Noah. Solely because of the fact that I know if I were to write about it, I may as well write out the whole ending of One Piece.
53. Marshall D. Teach and Monkey D. Luffy
54.  
55. Blackbeard's awakening will not involve absorbing other people's devil fruit powers into his own for his own usage.
56.  
57. Blackbeard's ability to use more than one devil fruit power is due to him having more than one heart and blood circulatory system. Each system does not commingle with the other.
58.  
59. Luffy will pull Blackbeard into a Dreamland, in which both of them will fight in the land of dreams. The battle will end with Blackbeard falling asleep forever.
60.  
61. Luffy is the one who will will all devil fruit powers back to "nature", thereby ceasing all devil fruits forever.