During a chat with Collider, Dean DeBlois, who co-wrote and co-directed the original and then wrote and directed the sequel on his own, declared that the third film will delve deeper into the character of Toothless, as well as the history of his species.
Plus theres no need to worry just yet anyway. This is still very early on in How To Train Your Dragon 3's development. In fact DeBlois - who admitted that he has been able to talk Dreamworks Jeffrey Katzenberg "down" from a fourth installment to the franchise and is currently just focused on what he believes will be the concluding saga to the trilogy - only presented his outline last week.
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