I think so: the "Seer" class in the upcoming Khromarium box set is supposed to be Jeff's take on the psionicist.

That is correct. It hearkens to a class with psionic-like abilities, functioning as a subclass to clerics and working as its own archetype within the system and setting. So, it has spell-like powers that develop with level gains, and these all relate to various mind powers from literature, myths, and films. To be clear, this is not the addition of a new subsystem within the game; rather, it is simply a class with this specialization of familiar spell-like abilities and its own unique abilities that are not shared by other classes. Thank you for your interest!