Dragon 100% was pushed into marines. Marines and WG probably did something which infuriated him and turned him against the way they solve things. Based on his and Akainu age which are the same, they probably went to marines at same time-were rivals maybe. Dragon saved a lot of people so It...
The thing is it was said by Kawaki at first chapter that he will sent Boruto to where he sent Naruto whether that means he is dead or not at that time is not really confirmed
What would be the point, Odens body was strong its not like gaining his soul would do anything, plus if that was the case its not like Oden would be am wtf I am Kaidos son now? Lets just go with it?😂