No matter how hard he tried or how much he wanted, Enji Todoroki could not erase his past sins against his family and couldn't save his own son from falling to villainy. What if he was given a second chance to right the wrongs of the past? Even if it meant altering his future into something unrecognizable?

Portgas D. Ace met his end during the clash with Akainu at Marineford. So why was it that instead of dying, he was transported to a world much more different than his own? He blamed his cursed Dad for passing on that Roger luck onto him, but Ace was always up for an adventure. What's one more?

Kyojuro Rengoku had given it his all during his fight with Upper Moon 3 demon, Akaza and while he accomplished his goal of keeping everyone on that train safe from harm, he was unable to save himself and was killed in battle entrusting his will and spirit to the three Demon Slayers who were with him. He never expected to wake up speaking to a fire spirit asking for his help.

It took everything he had and then some, but Tony finally managed to put his demons to rest after ending the galactic terror known as Thanos even if it cost him his life as a trade off. For years he was haunted by nightmares of his numerous failures and now, at the end of it all, he had finally earned his nice long rest. He never expected to be thrown into a world that wasn't his.

The Multiverse is a concept of which we know frighteningly little of and when something or someone begins making ripple effects throughout it, it's up to Danny and co. to help save it before the Multiverse collapses in on itself.