Responses
We don't know for sure yet, mc's brother from the modern days look suspicious. Remember when he said to MC to not care about the dragon problems in the early chapters?
I think he said that because he thought it was foolish.
But maybe you are right and his modern verson also going to be a villain. We have to wait and see
That the brothers have a helthy relationship in the modern days. It was the way of karma healing itself