What film in the HTTYD franchise was written and directed by Dean DeBlois?
How to Train Your Dragon 2:  The film is written and directed by Dean DeBlois, and stars the voices of Jay Baruchel, Gerard Butler, Craig Ferguson, America Ferrera, Jonah Hill, Christopher Mintz-Plasse, T.J. Miller, and Kristen Wiig, with the addition of Cate Blanchett, Djimon Hounsou, and Kit Harington.
i don't know