What: The last, rare remnants of the pigman nation, the pig priests.
Why: people love the zombie pigmen but adding a full race of pigmen, like the current villagers, would make them lose some of their mystique. Mysterious individuals who inhabit the old parts of the world would further enhance their mystery. Why are most of the pigmen zombies in the nether? What happened to their race to cause such a downfall? These are questions that only the pig priests can answer, and they aren't telling.
How: pig priests use a reskin of either the ranged or melee pigman mob, they spawn in 5% of desert or jungle temples and trade with the player whilst defending themselves from hostile mobs.