He's got a dream, he's got a dream... Oh wait, wrong fandom
I had a couple of very detailed dreams quite a while ago, and I wrote them down to share. I'll put each of them under a "spoiler tag" as they are rather long.
Spoiler: click to toggle
I just want to add that I had this dream BEFORE the first teaser trailer was released. I guess I can tell the future in my dreams? XD
I had an HTTYD dream last night, I think it's the first one I've ever had. I watched the movie right before going to bed, so I think that's what caused me to dream about this. I woke up when the dream ended and I was going to write it down, but it was still very early in the morning and I fell back to sleep. I've forgotten most of the detail but I still remember the general ideas.
I think I was watching a preview for the HTTYD sequel. I wasn't able to interact with what was going on so I'm pretty sure it was just me watching something. In it Hiccup looked obviously older, also had a bit of facial hair stubble. He was riding on Toothless through the sky while wearing a rather complicated-looking brown leather flight suit. They were having fun doing several tricks like flips and free-falling, when I believe they get attacked by someone else I didn't recognize who was also riding a dragon. After getting attacked they decide to follow this mystery person. (so far it sounds an awful lot like what was shown at Annecy.)
After this point I don't remember much specific detail. I remember seeing Astrid and Stormfly, going to follow Hiccup and Toothless to provide backup in case they get into a battle. I remember this 'preview' detailed some of the plot points of the movie, like what the general synopsis of the movie was and what was going to happen. (This part I'm rather glad I forgot) There was a scene that looked like Hiccup and Toothless had to part ways temporarily for an unspecified reason, and Hiccup and Toothless both looked so upset, it was heartbreaking. I felt quite emotional at this, and I think this burst of emotion is what woke me up. (If I get too emotional, angry, scared, upset when I'm dreaming, it almost always wakes me up.) There was more, but my memory is too vague to make out any specific detail.
Spoiler: click to toggle
So I was in a movie theatre, watching the world premiere of HTTYD2. A bunch of dignitaries were there, but I didn't see any of the cast or crew that I knew of.
It opens with a live-action, modern-looking Hiccup waking up from his bed. It is revealed that the entirety of the first movie happened in a dream that took place over one night. "Hiccup" is actually now a young man who's having a hard time finding his place in the world. He created the world of HTTYD in his dreams when he was about 13 to help him deal with the loneliness and ostracism he faced in his life. He wanted a place where he could be a hero, have a loyal friend, and escape from his real-life problems. He stopped visiting the dragons world shortly after the events of the movie, as he didn't want his dream world to become bigger than real life, and having it negatively affect his schooling and his relationship with the few family and friends that he had.
It had been a long time, possibly several years, since he last went to the other world, and now having finished high school and not being sure what to do next in his life, he decides he wants to go back to the world he created again. He discusses this during a car trip with one of his only friends, a friend he's had since childhood and who knows about his dreams. He warns him that he should be careful about going back, as he does not want him to become detached from his real life and become consumed by the make-believe he's created.
He considers his friend's warning, but he's just too curious and decides to visit again, so that night he decides to try to dream about it. He sets up this device that somehow is able to tell him while he's asleep that he's dreaming, which lets him become temporarily lucid and enter into the other world. He visits Berk and finds that Toothless is still there, having waited patiently for him for years for him to return. They decide to go flying again, them both having missed each other's company for so long. The dream is short as he's waken up by a problem with his dreaming device.
The next night, he goes back in and visits his friends in the Berk village again. He has a hard time recognizing anyone because everyone grew older, too. It seemed that even though he never visited the other world for years, time had passed in there as well. His 'dad', Stoick, is very happy to see him again, as he thought he had disappeared off of Berk for good. He learns that Berk is in possible danger, but Stoick did not want to say anything to the rest of the tribe because he didn't know what to do about it. But now that he's finally back, they need his intelligence and ingenuity to save them. Stoick's unable to elaborate before he wakes up again and the dream ends.
The third night, he's indecisive about whether to go back or not. He wants to help what he feels is his 'real' family, his 'real' friends in the Dragons world, from this potential danger, but he does not want what had happened a few years earlier to damage his real life again. He reluctantly decides to go back, because to him, saving what he has left of the place and the people that care about him is more important than what little 'real life' he has left.
The movie had just barely started, but I got a text from family saying that they needed to pick me up from the theatre right now because there had been an emergency. I decided to leave, upset that I couldn't watch the rest, but understanding that I could see it again when it gets released, and that family is the most important. On the way out of the theatre, I thought about what I had seen and realized that it totally didn't match up with the first movie, and a movie like this one wouldn't ever actually be made. I think this realization made me lucid, and that caused me to wake up.