User blog comment:Kogath/Monster Hunter: World Discussion/@comment-6050823-20171123145407/@comment-31029678-20171124123204

I have the feeling that what we see with G. Jagras will be the standard intros for monsters... while the other we saw about Anjanath and Barroth would be scripted story cutscenes.

Or they simply decided to give better intros only to key monsters.