User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-6050823-20140107011913/@comment-11112316-20140110064208

I have my doubts that such a creature could hide itself for so long, but who knows? Only the future has the answer.

I'm just making a guess on Capcom's mindset given their treatment of the series as of late. From MH4 to this G3, I like to think the creators are saying that Fatalis is the 'ultimate' monster. You know, sort of like how Akuma's almost always considered to be one of the strongest members of the Street Fighter cast. But like you said, nothing is truly set in stone.