User blog comment:Kogath/Monster Hunter 4 Ultimate for the Nintendo 3DS/@comment-4452412-20140424153601/@comment-4452412-20140424154933

It seems too long to be the wing of Rathalos though. Plus the fact that it just protudes out of nowhere. Considering Capcoms tendency to hide monsters in various things that they post (from what i have seen anyways) I think my guess is credible enough