Please post the scripture that states that there will be blood sacrifices in the Millennial Temple.
Ezekiel's temple is a good start. It is the temple of the millennium, and offerings of bullocks and goats, sprinkling of blood, the whole 9 yards. The term "kipur (atonement)" is used throughout.
Yet the priestly service is different from the Hebrew norm, too... It is a different system, confirming that this is not merely an ongoing institution. Ezekiel's temple has not happened yet.
All of the great prophets speak of burnt offerings, sacrifices... At least those who speak of the time past the end of days.