User blog comment:Stone Roger/Natsu and Zeref have somekind of relation?/@comment-86.14.61.113-20131116083217/@comment-183.83.13.216-20131206204551

There is a very good chance that Natsu is acnologia

http://i1.ytimg.com/vi/Do0dW947-bg/maxresdefault.jpg

check this image.... they look very similar