Reborn in DC & Marvel world as supreme saiyan

A kind soul who lost everything in his life gets reincarnated into an apocalyptic dc & Marvel world with the body of the legendary saiyan and Gamer system......a world were darkside and Thanos had conquered everything and the remaining heroes are trying to resist them......can this new legendary saiyan be able to become their new hope? or will he become their greatest nightmare? warning ⚠️ there will be lot of mature themes in this novel including Gore and sex scenes also this a 'HAREM' novel so be warned.