Even the "mainstream" "doctrine" of the rapture is cobbled together from a few unconnected bible verses. The bit in Thessalonians, plus the passages in Matthew and Luke about one being taken and one being left behind. Sometimes they'll try to find something in Revelation that hints at it. Among the rapture believers there is fierce argument about when the rapture will occur, whether before the Great Tribulation (Pre-Tribulation), during (Mid-Tribulation) or after (Post-Tribulation). Some will condemn you to Hell if you have the wrong view of when the rapture will occur. I believe Texe Marrs was one of those (he was post-trib). The late Tim Lahaye (The Left Behind series) was pre-trib. The different timings are related to the various prophecies, interpreted to be about the GT, featuring a period of seven years and an intermediate period of three and a half years (long time JWs will be fully aware of those, I imagine).
Back to the WT version. If the GB are now allowing for a rapture, are they pre, mid, or post-trib?