User blog comment:Iridescentdragonfan/A Fourth Movie?!/@comment-24413325-20160723074622/@comment-31352869-20160725022755

Actually Dean specifically says that he is done with the franchise after the third film, as he would be finishing the story he started. There is not going to be a fourth fillm. There is no way they can. How to Train Your Dragon was written out as a trilogy, and it would be foolish to try to do  a fourth film. The series will be done after the fourth season of Race to the Edge is released. There is no way they can do a TV series between the second and third films. Also, the showrunners Doug and Art are leaving the dragons franchise once Race to the Edge is done since their work will be finished, and there is nothing more for them to do and no more TV series for them to write. Most likely the franchise ends after the third film is released. Though it is likely they mght have a short that they release along with the release of HTTYD3 on Blu-Ray, DVD, and Digital HD, like they did for the first two films.