Chances of facing a Primal/Boss Carbuncle?

[Arduno]

Wondering if SE said anything about it

Would be kinda awesome to see a Boss Carbuncle
It would be even more wicked if the boss could punish players
that try to summon a normal smaller Carbuncle

I can already see it happen..
Arcanist tries to summon a Carbuncle
Carbuncle's head pops out of the summoning circle
And a chain of Carbuncle's jump at the Arcanist that drag the
Arcanist down within seconds!! Into the Portal the Arcanist himself summoned
K.O!