User blog comment:Kogath/Monster Hunter X Discussion/@comment-5167887-20151123101504/@comment-184612-20151123153414

The interview is from the newest issue of Nintendo Dream, it's not him speculating.

They also made sure to specifically say only 亜種 (Subspecies) would not be returning. They made no mention of 希少種 (Rare Species), like Gold Rathian, Silver Rathalos, Molten Tigrex, etc.