There are four things that must happen before Christ will return for His church, according to Bible prophecy.
The next thing that has to take place is referenced in Ezekiel 38:11 which deals with the last-day invasion of Israel. In this scripture, Ezekiel describes the invaders attacking unwalled and ungated cities in Israel. If you look up this scripture in a commentary, it will describe these walls and gates as being symbolic of peace, safety and security. However, these commentary writers had no idea that, in 2002, Israel would build walls and gates around their entire country. These walls have to come down in order for Ezekiel 38:11 to be fulfilled. This event will be God's last warning to the church to get ready for the second and third events that will happen simultaneously.