User blog comment:Logo8th/Book Wyrm/@comment-26703272-20150902063648/@comment-5690373-20150903140853

They could add some of the background dragons from HTTYD 2, like they did with the Thunderclaw, Windstriker and Thornridge, or they could add the three gronckles and the three nightmares that were named in RttE. Or they could add the catastrophic quaken. There are lots of things they could add, I don't think they are running out of ideas.