Or Pudding stays exactly as she is now and doesn't erase anyone's memories, but they're forced to accept her for some other reason and we get a member of the crew who has morality at odds with everyone else.
What's wrong with that?
Oh, I know how.
They go through with the wedding, but somehow realize that her plan has failed now that Sanji knows about it and can counter it. His power is not good enough to edit everyone's minds and if she wants to keep appearances, she has to marry Sanji for real. He goes through with it because is his way of having his revenge.
During the wedding night, Big Mom reveals her real plan: She wants to have a super infant to be part of his army and take its soul. both Pudding and Sanji can't fight against her, so they are forced to have an offspring right there and there. Pudding gets pregnant immediately, but they realize Big Mom can't steal the baby's soul right away because reasons. So they have a few months to hatch a plan and escape. With tears on their eyes, they have Luffy and crew leave since they need to come back later and rescue them, now with their fool force.
Months pass, Big Mom is ready to take their child. The whole time Pudding keeps her personality while Sanji confronts her but still acts chivalrous to her. With their time together in captivity, they somehow fall in a classic love-hate relationship, this takes 3 panels, tops, because Oda hates romance and no one has time for this crap, most of the time we have cool fights in Samurai land, cause that is what we really want to see.
Big Mom is using the baby as a trojan horse to get to the Reverie as the newest member of the Vinsmoke family, Pudding and Sanji can attend because of it, with a close eye from Big Mom, who is close but not close enough. Also Jinbei acts as their Godfather because he is fat, I guess. This is the moment they have been waiting for and the Straw Hat crew gets there to help out, too. Vivi and Carue are there too because fuck it this is what everyone wants, right? Anyway, everyone is in the Reverie, its been only 3 months but Pudding has huge boobs now because pregnant and Oda likes that. Also she gets mood swings and the crowd goes wild, this is great storytelling guys.
The Straw Hat crew forgives Pudding even if she still acts like she is because lol, she is pregnant. Sanji quits smoking for the good of the baby so he starts on sucking lollipops. They quickly try to run away with the whole crew, but Big Mom is close and she is fucking pissed, and now that she can't use the soul of the unborn baby she is going ham on the crew. They are able to pursuit them and her huge fleet of weirdos are about to attack.
But wait, what is that?
Out of nowhere, a huge whale just headbutts the ever living fuck out of the ship of Big Mom. Is Laboon! Holy shit, Brook jumps at him, tears on his eyes. Big Mom then does a huge soul attack that somehow works like buggers and just almost kills everything, key word almost. They somehow survive, they try to escape with the Sunny Burst they always do but of course that fails. Carue falls off the boat, stupid bird. Vivi cries, losing the only thing that made her likable. But what is this? Is Pell! He saved Carue!
"Yes, I am back."
Fan lose their shit, he survived all those episodes ago just for this, FUCKING GODA.
"I am off now"
What is that he has? Oh shit, its revealed he actually was a Nuke Bird who ate the nuke bird nuke bird fruit, so he can survive nukes. It all makes sense now. He flies off into Big Mom "EAT THIS"
KA-BOOOOOOOOM
Everything gets fucking destroyed, her float is just annihilated. I forgot to mention this, but before all this there was a lot of intense one on ones and team ups during Reverie and escaping and stuff and by the time they are escaping all of them except Luffy, who is in a coma because he ate a second devil fruit by accident, are just completely damaged and shit. They are bloody and stuff.
But what is this! Big Mom is not dead yet, she has absorbed all of the souls and made a wall with them to cover herself from the nuke. She got damaged, but she can still fight. She can use souls to walk in the air. "I AM ONE ABOVE ALL, I AM THE MATRIARCH"
Zoro decides to get real and she gets in front, everyone else is just too fucked up.
"Its time"
He opens his eye.
"SHARIGAN"
HOLY SHIT.
"One Piece is going to be in hiatus next week. Thanks for your understanding"
FUCK.
The issue sells out in seconds, the reddit servers are dying, the anime take 20 minutes to do the Sharingan reveal, with a dramatic pause every 5. vBlogs are having a field day and Velk almost has a mild stroke, but quickly recovers because he has to post his opinions on neogaf. The OT reaches the "|OT5| PUDI PUDI PUDI PUDI PUDI PUDI ".
The next chapter comes back. A twist is revealed. Pudding implanted the memory of the Sharingan into Big Moms mind, it never happened. Zoro was still to weak to fight. It was all a ruse so Big Mom would be too afraid to attack, giving Luffy time to recover. He never ate a second Devil Fruit eater. He just had an Awakening. He can turn water into Rubber now. She thanks Pudding for buying him time, she winks and tells him to suck on a bone. Luffy just laughs it up. "Even if you are mean, You are nakama now". Pudding has a sly smile, she is still planning something.
Luffy gets up and gets in front up Big Mom.
"GEAR."
Big Mom gives a menacing roar. "STRAWHAAAAAAAAAT"
The fucking air becomes rubber.
Pudding has long ago realized something. Her Films are made of Rubber Plastic too.
Pudding can directly manipulate Rubber.
Pudding can directly control Luffy and edit him to her liking.
Pudding takes over Luffy.
"FIVE"