I once wrote something similar on Tumblr but thought it would be much more fitting if I wrote it here instead where more could see it andactually act upon it in comparison.
The reason why I wrote it is because one, I don't know Japanese and two, I don't know how to send a letter due to how complicated the process it is along with outdated so I wrote of questions I came up with that others that read this might likened agree on and ask Oda themselves.
The birthdays of Loki, Ida, Harald, Scopper Gaban, Colon, Ripley, Gunko, Sommers, Killingham, Garling, Rocks, Eris, Marlon, Ochoku, Ganzui, John, Barbel, Kyo, Mato, Ange, Kiba, some of the giant children, Estrid, Five Elders, other Roger pirates and/or Hanafuda
The names of Urouge, Onigumo, Epoida, Jailer Beasts and Dalmatian's devil fruits.
What happened to Little Oars jr. after Marineford
What type of school teachers would each of the straw hats be
What breed of dog would each of the straw hats own.
What type of fish would each of the straw hats (sans Jinbei) be if they where fish-men
Either other previous warlords or the first line up of them.
Gecko Moria's epithet
What where the names of of the last four Rumbar pirates to die before brook as well as their doctor
If any other of the Big Mom children are married and have children.
How would Toko look like if she didn't eat SMILE
Ulti and Page One without their masks.
The fate of the other Bellamy pirates
Does octopus fish-men have three hearts.
How exactly was Hachi able to escape the marines.
Gol D. Roger's first bounty.
What happened to the hat Law had pre-timeskip.
The physical appearance of the; Bari Bari No Mi, Doa Doa No Mi, Doku Doku No Mi, Hebi Hebi No Mi Model: Anaconda, Hebi Hebi No Mi Model: King Cobra, Hito Hito No Mi Model: Buddha, Hie Hie No Mi, Horu Horu No Mi, nu Inu No Mi Model: Jackal, Inu Inu No Mi Model: Wolf, Kibi Kibi No Mi, Magu Magu No Mi, Ori Ori No Mi, Pika Pika No Mi, Shiro Shiro No Mi, Soru Soru No Mi, oto Oto no Mi, Tori Tori No Mi Model: Falcon, Toshi Toshi No Mi and/or Wara Wara No Mi.
Other Baroque Works that never appeared
Why are dinosaurs dragon-dragon fruits and not lizard-lizard
The roles of the other Roger pirates.
Sugar's reaction to Monet's death since they're sisters
What order did the Roger pirates join
The roles of the other Roger pirates
The bounties of the other Roger pirates including Crocus, Rayleigh and gaban.
What type of fish-men are Sunbell, Barbel and Namur
If Koby has any friends or family before Alvida
What type of devil fruit is the Gunyo Gunyo No Mi.
A deeper explanation of what Oni are as a species.
How did Moria use zombies at Marineford considering how the process actually worked in Thriller bark
Why does both Marlon and Ochoku have a striking resemblanceto Krieg and Caribou respectively
What happens with the mirror-world and/or door dimensions if their devil fruit users died as well as someone being inside there if it happened
What specifically happened to Alvida after Luffy defeated her and how did she find a devil fruit due to how rare they are in the east blue
Why did the Macro pirates become slavers despite their past with Tiger.
Which of the Beast Pirate's devil fruits are from Hanafuda
What happened to Scotch after Caribou defeated him
More info about Hanafuda and his history
The real names of the fish-men ministers
Bellemere's marine rank before leaving and if there's any (pre-established) marines that she knew.
Whatever happened to Bluejam
If Zoro had ended up joining baroque works, what codename would've he had gotten.
Since.a native hunting competition would’ve happened the same year Luffy started his journey, what island did it happen in