What will be like initially?
Rashi: I will establish for you Kosher judges.
Radak: This is like it said "Mele'asi Mishpat" (21). This will be in the days of Mashi'ach, when all Resha'im will be eradicated; "She'eris Yisrael Lo Ya'asu Avlah v'Lo Yedabru Chazav" (Tzefanyah 3:13).
Malbim: It will be "Mele'asi Mishpat" via proper judges, and "Kiryah Ne'emanah" (21) via good counselors.
What is the difference between "Shofetayich" and "Yo'atzayich"?
Malbim: Shoftim judge Bein Adam l'Chavero. Yo'atzim counsel Bein Adam la'Makom.
Why does it say "Ir ha'Tzedek"?
Rashi: This is like initially - "Tzedek Yalin Bah" (21).
Malbim: It is virtuous in matters Bein Adam l'Chavero.