I don't know about Massive, but what you are looking for/trying to make is a processed vocal sample (edit to taste/compress/EQ) with a very healthy dose of delay and soaked in reverb and what sounds like reverse reverb (it could be an effects patch, or it could be created by copying and actually flipping/jockeying the vox on a separate track).
Here's a few videos to point you in the right direction: