Obviously, a lot of old archetypes for the monk won't work with the Unchained monk, including a bunch of really popular ones like Zen Archer. What I propose in this thread is that we look for reasonable adaptations for these archetypes so that GMs and players can use them with the Unchained monk, should they so desire.
Of the Paizo-published monk archetypes out there, only the master of many styles, the hamatulatsu master and the weapon adept are completely compatible as things stand (technically qinggong kind of does but is completely unnecessary with the qinggong ki power; monk vows, while technically not an archetype, kind of act like one and would be compatible too). All the rest would require at least some alterations.
My assumption is that, for most archetypes, the new abilities would have text along the lines of "This replaces the ki power normally gained at 4th level" or something similar. Many of these conversions might be handled quite simply in that fashion, but I could see places where a given archetype might want to be exclusive with a certain ki power. Others might be obsolete if there is a ki power that does functionally the same thing.
So - what are your guys' thoughts?