When will the Old Testament saints rise?
The Old Testament saints will rise when the kingdom is set up. They must wait until that time, because Israel is not going to enjoy the elevated role that the body of Christ will enjoy. Their resurrection therefore occurs at the establishment of the kingdom.
Les explains that the Old Testament saints are going to have to wait until the kingdom is set up. He contrasts this with church-age believers, whose bodies will be reunited with their soul and spirit at the end of the seven years so they can come back with Him. Israel will not enjoy the elevated role that the body of Christ will enjoy, so the Old Testament saints' resurrection is later, at the kingdom's establishment. Meanwhile, departed saints are in the presence of the Lord in soul and spirit, waiting for resurrection day.