When the end of days finally comes all prophesy will be revealed. Verse 7 says, But in the days when the seventh angel is about to sound his trumpet, the mystery of God will be accomplished, just as he announced to his servants the prophets. We need not worry about when all prophesy is fulfilled, we simply need to trust in God that He will provide us with all the answers when the time is right. All prophesy is for His glory, not ours.