HBO has a plethora of stories and events from the Game of Thrones universe that they could potentially turn it into a movie, ...

Aegon rode Balerion, while Rhaenys rode Meraxes and Visenya rode Vhagar. Aegon formed alliances wherever possible and was able to bring numerous houses into the fold without the need for violence.

Known as the Black Dread, Balerion was the biggest and strongest of all of the dragons that set foot on Westeros, as his massive head alone was big enough to swallow at least two horses whole.