Baki/Kengan ashura story: Suiryu the dragon king

Suiryu Housen has spent the last 25 years of there life training in martial arts. His grandfather taught him a martial art known as the dragon style which gave him superhuman strength even at the young age of 13 making him stronger then some adults. At the age of 18 he began boxing as a career and at the age of 19 became the heavyweight boxing champion of the world. He then switched too kickboxing where he became the kickboxing champion of the world after beating the champion in only 1 MONTH!. He then switched too MMA where he became the heavyweight MMA champion of the world and was known as the strongest man in history. But there was one problem he was too strong! there was no one left in the world who can challenge him so he became bored and after a tournament where he barely won he died due too poisoning and met a man who claimed he was god.
God explained that after dying a warriors death he was allowed too be reincarnated in his two favorite mangas baki and kengan ashura. After granting Suiryu some powerful abilities Suiryu was reincarnated and swore too become the strongest man in this new world!.