According to a US New and World Report article, Jews are being trained for service as priests for the third temple. Unfortunately their service will probably not last for more than 3 1/3 years, and it will be under the harsh rule of the antichrist.
Many scholars believe that this temple will be built during the first 3 1/2 years of the 7 year tribulation period. Then right at the midpoint of the tribulation the antichrist will take over the temple. 2 Thess. 2:4 tells us that “he sits as God in the temple of God, showing himself that he is God.” I would hate to be one of those priests during this time. I can’t imagine what the antichrist would require of them. But I think this 3rd temple will only last for 3 1/2 years until Christ returns. There is no indication in the Bible what will happen to this temple but my guess is that it will be destroyed to make room for the 4th temple.
This fourth temple is described in detail in Ezekiel 40-48, which will last for 1,000 years—all during the Millennial reign of Christ. According to its dimensions it will be much larger than any of the other temples. There are some wonderful YouTube videos displaying this temple (look under Ezekiel’s Temple).
Anyway, I wonder if the Jews being trained for priests have any idea what they are getting into. And I wonder myself how soon it will be before temple construction will begin.