Board Thread:Admin Noticeboard/@comment-1030114-20151008180521/@comment-1030114-20151008181129

Well, the Heisei versions of Gyaos did have different roars, and the Gyaoses in this trailer do seem to have a similar roar.

It might be possible that the first part of the film's trailer is actually set at some point during the Heisei Trilogy Timeline, featuring a new Gyaos attack in 2009, 14 years after Super Gyaos, and 10 years after Irys was defeated.

But then again, I'm just speculating.