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Hmm, do you think there will be angels and demons on that war?

Yes... There will be. It was stated clearly in the Bible. In further explication terms, the Old Dragon that's the devil will deceive many kings (men of the earth) to wage war against the armies of heaven.
The host of Angels will be led by The Lamb and that's Jesus, together with the Saints, Faithful and the Chosen ones. When I read through these, it blew my mind that God indeed is most powerful. He created the world and everything within it is subjected under his power including the the beast itself. The Battle is coming the happen at the place in the Hebrew word called Harmgeddon (Rev16). Rev 17: 14 in addition he mentioned that they will wage war against the lamb, but victory assuredly goes to the Lamb.

Got to read it again. I completely forgot what I've read about Armageddon already.