User blog comment:ThomasNealy/Prediction for Jack/@comment-31767970-20171226225825

I think that Jack will kill Michael from the alternate reality, maybe lucifer too and bring the angels from the alternate universe to the main one to solve the problem of angels being nearly extinct. About him ruling heaven i never thought about this but could be a possibility, i holpe that at least in the end of the series he takes Adam out of the cage, erase his memory about his excruciating time in prison and leaves Adam's soul finally rest in heaven.