User blog comment:Kogath/Monster Hunter: World Discussion/@comment-31029678-20190208002724/@comment-31029678-20190209094057

Regarding the canonicity of these collabs, I don't think they are canon yet. Surely the FF stuff seems to be canon to The Witcher one though and probably will be canon to other future collabs as well.

As long as a Cactuar or a Nekker or clear references of Leshen, runes and Behemoth don't appear in main cutscenes or dialogues in future I wouldn't really count them as canon but rather as just little gameplay bonus rewards.