Getting Reincarnated As Karna With System In Mahabharata

I don't want to hurt anyone's religious sentiments. what will change when a soul from Kalyug will born in Dwaparyug as one of the most strongest warrior. will he change fate of everyone or just go with the way everything was. will he help people who were wronged or will he just close his eyes and move forward. to find out just read the story.