User blog comment:Stone Roger/Natsu and Zeref have somekind of relation?/@comment-101.174.197.171-20140430072854/@comment-123.231.120.23-20140430122627

That never even came to mind. But who knows. Just don't throw the possibilites out the window. We are pros at speculating after all. Zeref is a 400 year old Super Mage after all.