When cross-referenced with other scriptures another explanation presents itself - that Abaddon, the angel who will bind Satan for one thousand years, is none other than the arch-angel himself, Jesus Christ. "You're crazed!" you all scream. "It cannot be!" Observe:
Revelation 9:11 speaks of Abaddon as being the angel of the abyss, then later in Revelation 20:1 we see the angel with the key to the abyss binding Satan and throwing him in. This we already know, but Hebrews 2:14 tells us that Jesus himself will "destroy him that had the power of death, that is, the devil." That he is capable of doing so is evidenced by the well-known account documented at Luke 8:30,31 which tells of Legion, the man possessed by many demons, who implore Jesus not to send them into the abyss.
It isn't just me who thinks Abaddon is a goodie either; the Interpreter's Bible says: "Abaddon, however, is an angel not of Satan but of God, performing his work of destruction at God's bidding."
Who'da thunk it?