I don't think All Blue is destruction of Red Line, cuz that's part of Brook's Dream instead
I believe All Blue does already exist somewhere & while people think it connects all Seas, it's actually the source of Infinite Genes, meaning it's not a place where all kind of Sea Creatures meet, it's really the place where all kind of Sea Creatures are created
(This is why Sanji's Journey so far has been about Genes from Ivankov to Big Mom to Judge to himself ... etc He will eventually discover a Big Reveal about Genes)
The reason All Blue wasn't found is cuz it's simply not "Activated", meaning it's lost it's Ability to alter the Genes of Fish or Creatures inside it, however it's not completely lost, it's instead carried by someone else, who is this person? It's none other than Big Mom!
This is why her Dreams is to create a place where all kind of Creatures & Races can live together, it's cuz she inherited Will of All Blue, and that's cuz she wasn't just born Genetically Modified like Germa Siblings, she was born like that cuz she Inherited Power Source of All Blue, hence that Ultimate Defense she has even though her Body is Fragile, the Automatic Barrier is to protect the Power Source inside her, not herself
How was Big Mom born with such Power? It's for the same reason Vegapunk was born Smart
Vegapunk inherited Intellect from an Ancient Records (Similar to Vega Records but created by Ancient Kingdom instead)
And if you go check Enel's Cover Story, you will find there was also an Old Scientist who lived before Vegapunk who was clearly very advanced too & he created same Automata as Moon People, it's cuz City of Birka on The Moon is actually Ancient Records & it's Knowledge is passed down through generations in Vega's Island
Anyway, without giving more Details, i discovered that there is a Place to Record Knowledge, a Place to Record Genes & a Place to carry Souls.
Knowlege Records is inside a Hidden City on The Moon
Genes Records is inside a Hidden City on Earth (All Blue)
Souls Records is inside a Hidden Place inside The Sun (DFs, Sun God Nika, Mary Geoise National Treasure, Blackbeard, Double-Layered Eyes, Straw Hat, Enies Lobby ... etc are all connected to this Sun City)
Birka (Sky Island) was Home of a Moon Worshipping Tribe & Birkans came from The Moon where Knowledge Records are Stored
Enies Lobby was Home of a Sun Worshipping Tribe (Hence the Permanant Day there) who came from The Sun where Souls are Stored
Meaning that to find City of All Blue, we need to discover a Special Group of Scientists who worship the Land/Earth, had to leave their All Blue City & settled in a Place that inherited Religion/Culture but eventually got destroyed!!
Is there someone related to Science, said to be from Special Race, he isn't in his Kingdom anymore & is Religious?
It's none other than Bartholomew Kuma!
This is where it gets even more interesting, who led to Destruction of Birka? It was Enel
What happened to Enel? He eventually became Moon God
Who led to Destruction of Enies Lobby? It was Luffy
What happened to Luffy recently? He became Sun God
In other words, Kuma's Tribe originated from a Place that got destroyed because of someone who wanted to become Earth God, in other words King of The World, and Oda more than made it very clear, he literally named him "Rocks"
Yes! this means that Kuma's Special Race originates from God's Valley & their purpose was to Re-Awaken their Original Hidden Kingdom
Or shall i say "Ancient Kingdom"!! In other words, All Blue is inside Ancient Kingdom (Who also turned The Moon into their Knowledge Records & turned The Sun into their Valhalla-Like Place)
Now you understand why Egghead is focusing on MADs Group, Lineage Factor, Sun God & DFs, Lunarians, Ancient Kingdom, Kuma, Kid (Who is from South Blue btw) arriving at Elbaf, Clone of Bakkin who turned out to be both a Scientist & a Rocks Pirate, Red Line, Mary Geoise ... etc
Oda never ever gives so much info if they weren't connected, cuz he said before that he hates Confusing Fans
In other words, all the Sub-Plots currently shown at same time now are related to one & same Subject
It's "Ancient Kingdom"! (This is btw the same reason Kuma is acting same as that Ancient Giant from Ancient Kingdom)
And i'v just explained that Power Source of those Ancient Robots is same as Power Source of All Blue, which is inside Big Mom
When does Big Mom lose her Barrier? It's when she is Emotionally Broken
In other words, that Barrier works with Emotions, and it's also same Power Source of Sanji (His Flames are as strong as his Emotions)
This is also why Oda made Sanji take the Science Route, everything is connected, it's Huge Lore, not just some random Water found somewhere
This is also why those Ancient Robots look like Ancient Giants, while Big Mom is literally as Strong & Act like Ancient Giants such as Oars
Even in Punk Hazard, it's clearly shown that Experiment to turn people like Big Mom is the same as Experiment to try & re-create Ancient Giants, it's cuz Big Mom's Power Source once belonged to Ancient Giants (Mainly Oars)
And this is why Numbers were deemed Failure even though they are Huge, Strong & Dumb Obedient, it's cuz none of them inherited that Power Source which was inside Oars The Second (The Skull they found on Punk Hazard, as Numbers were an attempt to Clone it)
I'm so excited for Egghead Arc Ending, cuz once certain things & certain Characters are revealed, i will share with you Strong Evidences that i never shared before that gives you answers of every single Mystery, it's indeed a very long Lore