Why will the Korbanos be called "Zivchei Tzedek"?
Radak: Before, they were Zivchei Shav - "Lo Sosifu Havi Minchas Shav Ketores To'evah" (Yeshayah 1:3). In the days of Mashi'ach, they will be Zivchei Tzedek; You will desire them.
Malbim: You will not only have Ratzon for them, rather, even Chefetz (desire the matter itself). The Shelamim will not show success in this world, rather, Tzedek - to thank that You teach to them the ways of Tzedek, and cause Tzedek to always be among them. Also Olah v'Chalil will not be for sin, rather, to show Tzedek.
Why does it say "Olah v'Chalil"?
Radak #1: This is a repetition. Olah is Kalil (totally burned)!
Radak #2: Kalil refers to Minchas Kohen; it is totally burned.
Why does it mention bulls?
Radak: This refers to Chatas 1 and Shelamim. It mentions the bigger species from which we bring Korbanos; the same applies to lambs.
Malbim: You will not desire "Bechori" and Pri Bitni" (Michah 6:7) for Korbanos, only bulls.
Radak (100:4): In the future, people will not sin, and there will be no Korban Chatas. (Perhaps they will bring for previous sins. Alternatively, here Radak discusses an early stage of Yemos ha'Mashi'ach; there he discusses a later time. - PF)
