User blog comment:Kogath/Monster Hunter 4 Ultimate for the Nintendo 3DS/@comment-21371438-20140502102813/@comment-3277384-20140503165355

they are concepts in a concept book, until they wouldn't be shown up in the games they shouldn't be considered as canon.

By the way it's open to personal interpretations. Keputous (or how the heck it is called) I personally believe it CAN be canon, just because its existence makes sense in the evolution history of MH imho.