I love so much this movie! And I can't wait for the sequel, so I try to imagine what kind of story there is the HTTYD 2... And so I thought Hiccup, Astrid, Fishlegs and Co. could have become teachers in the new Academy of Berk.... and that Hiccup had arrived late for the flight lesson and Astrid has had to fix it. Is it probable? XD
Oh fuck... i don't expect something really great from a fourth movie... i mean remember what happened with Shrek? The fourth one was a shit. So what can we expect from HTTYD 4? They will probably be out of ideas and make a shit after 3 movies. But anyways this is just my opinion, you others can think whatever ya want.