This is a pretty rocking song, and I think it has quite deep meaning.
It immediately invokes the imagery of Revelation 1: 7 (see also Mt 24: 30 26: 64 Ac 1: 9, 11), when the bible describes Jesus' return. The saints (i. E. Believers) will meet Jesus and rejoice or sing before him in their home in heaven.
This song also carries a warning not to throw away faith and highlights the fact that we need constant reminders. I think it also touches on the need to remain vigilant.
I think the title matches with the above in that this forms a sort of prophecy (i. E. A future event that has not yet happened). Prophets were often ignored (especially minor ones) so the title might be pointing to this as an underrated message that has been largely ignored.
Haste the Day have done a great job of including multiple aspects of their faith within this one song. Nice one boys!