However, there are several other things also clear in scripture
--the sacrificial system, the blood of animals, never did what Jesus was the only one able to do. The blood of animals never cleansed the first man.
--there, imo, are multiple passages throughout the prophets and else where that speak of the time that the Messiah, King, will rule the earth
So there are only a few options as to what to do with all those passages, including the ones regarding the future temple and sacrifices. One can either consider them allegorical then apply them in some way, or one can take them as being written literally and to be fulfilled as they appear when taken written literally.
Our lack of understanding, or grasping God's purpose in the resuming of animal sacrifices is no reason to then say it will not happen...especially when we also know that animal sacrifices never did what only Jesus could do. Can I give a definite explanation, no...but that again is no reason to reject the possibility.
Many believe the resuming of the sacrifices is as a teacher and reminder. And there is another thought that because mortal men will be serving in the temple, mortal men will again be entering into the presence of God, God's presence will again be amongst mortal men...the sacrifices are not a matter of eternal cleansing and life, "born again"...they are a matter of the flesh...the ceremonial and ritual cleansing of the flesh.
Heb 9:11 But Christ came as High Priest of the good things to come, with the greater and more perfect tabernacle not made with hands, that is, not of this creation. 12 Not with the blood of goats and calves, but with His own blood He entered the Most Holy Place once for all, having obtained eternal redemption. 13 For if the blood of bulls and goats and the ashes of a heifer, sprinkling the unclean, sanctifies for the purifying of the flesh, 14 how much more shall the blood of Christ, who through the eternal Spirit offered Himself without spot to God, cleanse your conscience from dead works to serve the living God?
The blood of animals never cleansed men, nor did the blood of animals ever give eternal life....those of old who believed God, those of old with faith, are cleansed and have eternal life the same way we do, the Blood of the Lamb...not animals.
At present, we do not enter the presence of God within our mortal bodies...we enter spiritually and that through Jesus. Our flesh does not enter into the Most Holy, or the temple in heaven.....