Are the powers and authorities in Ephesians brought under Christ's rule - the same as every nation bowing in Revelation? In the book of Ephesians we see:


  far above all rule and authority and power and dominion, and above every name that is named, not only in this age but also in the one to come. 
  Eph 1:21
  
  His intent was that now, through the church, the manifold wisdom of God should be made known to the rulers and authorities in the heavenly realms, 
  Eph 3:10
  
  For our struggle is not against flesh and blood, but against the rulers, against the authorities, against the powers of this dark world and against the spiritual forces of evil in the heavenly realms. 
  Eph 6:12


Now in Revelation we read:


  Who will not fear you, Lord,
      and bring glory to your name?
  For you alone are holy.
  All nations will come
      and worship before you,
  for your righteous acts have been revealed.
  Rev 15:4


My question is: Are the powers and authorities in Ephesians brought under Christ's rule - the same as every nation bowing in Revelation?
In Ephesians 3:10, heavenly beings in general are meant -- angels and demons. Through the church, God "teaches" heavenly beings something of God's grace and love that they never saw before. 

In Ephesians 6:12, it speaks of the evil beings in the spiritual realm, demonic. It specifically distinguishes between earthly and heavenly spheres of influence, telling us that the physical battles against our faith are ultimately spiritual in origin, that satanic forces are against us, operating through earthly powers and means. Satan used the seductions of the world and the flesh in his attempt to draw Jesus from the faith in the wilderness episode in Matthew 4:1-11.

In Revelation 15:4, it's referring to earthly governments. Jesus will come again to earth, depose all earthly kingdoms and set up His own government with members of the church ruling. See Matthew 19:27-28, Revelation 2:26-27 and 20:4-6.