I don't know why they assume just because rogue 狼 are involved, it must be the same group led 由 King and Princess. While the possibilities are still there, there has not been any onscreen presence of those two since A Howl-iday Adventure. I can only guess that the King and Princess look-alikes in Great 狼 Games were simply just re-skinned 狼 because it seems strange that they'd make themselves public to an event like that.

And speaking of re-skinning wolves, it's common knowledge 由 now that just about every 狼 character except for the originals are what they are- cheap re-skins. Princess is Claws, the 狼 Ghost is Scar, Lois is Sweets, etc. So for all we know, all these rogues are skinned off of other rogues. They could be from King's pack and it's possible they couldn't be.