User blog comment:Kogath/Monster Hunter X Discussion/@comment-5963861-20151109060312/@comment-26261665-20151109194151

The other three flagships were designed to fit in the different villagues and generations, being representative of them. But in Dinovaldo´s case, it appears in the new area,and there is a new villague,so that villague never had a flaghsip before,unlike the others. The closest thing to a rival could be another flagship of this generation,but Regios is already rival of Los (trough  they are more equal in terms of strengh that Raizex vs Los) and Gore doesn´t really fit as its rival.

So I suppose that for the moment they haven´t designed its rival.