Majin Izuku

My Hero Academia and Dragon Ball Z are in the same universe. All Might isn't the strongest hero, he's not even in the top 10. Goku is number one, Vegeta is number two, Gohan is number three. Piccolo is number four, Android 17 is number five, Android 18 is number six, Tenshinhan is number seven, Krillin is number eight and so on. Goten and Trunks will be the same age as Majin Izuku which means Super Buu was defeated by mystic Gohan, he turned into Kid Buu after that and Vegito beat Kid Buu with a fusion spirit bomb. Goku enjoyed the fight and wanted to fight a good version of Kid Buu. This is when Izuku was born, he never knew his actual parents but was adopted by Fat Gum. He was just as strong as Kid Buu was before he was destroyed. Izuku, when he's a kid, will look like Kid Buu but as a teen, he will look like super Buu but stronger than Kid Buu... by a lot. Izuku will be able to talk much like super Buu. Also, this is around the time Beerus had left earth. Goku and Vegeta can use god ki and can enter Super Saiyan Blue. Izuku will eventually tap into god ki. Quirks are just personalized ki. Anyone can use ki if they train hard enough. Most heroes know how to use ki so everyone is basically stronger.