They are one and the same. Whether it's written as Comic-Con or Comic Con, it represents the same gathering of comic enthusiasts and the showcase of all things comic-related.
The trailer gives you a sneak peek, but the movie has more depth and details. The trailer showcases some exciting scenes, but the full movie expands on the story and characters.
The How to Train Your Dragon Comic Con trailer is like a teaser. It gets you interested, but the movie is a much more comprehensive and immersive experience with a complete story and character development.
No, Comic Con International doesn't own Comic Con. Different organizations or entities might be involved in organizing and managing various Comic Con events.
Comic Con and Comic-Con are basically the same thing. They're both events focused on comics and related pop culture. Maybe the only difference is in the specific location or organizing team.