Board Thread:Warhammer 40k General Discussion/@comment-25149066-20140730083800/@comment-24944355-20140812230412

My theory has been that he is too powerful now, the Emperor's power has sky rocketed over the millennia to the point that without the golden throne to sustain him his essence would burn out even a fully whole & healthy version of his body. The Emperor is now probably more powerful than any one of the chaos gods and THEY can't take bodies in the material world either, likely because they are once again to powerful and would burn through any physical form in quick time.