“I have yet many things to say unto you, but ye cannot bear them now. Howbeit when he, the Spirit of truth, is come, he will guide you into all truth: for he shall not speak of himself; but whatsoever he shall hear, that shall he speak: and he will shew you things to come.” Jesus to His Disciple/Apostles, John 16:12-13, KJV, Emphasis added.
The New Apostolic Reformation (i.e., NAR), a charismatic movement within evangelicalism’s “big tent,” believes that just as the Holy Spirit guides Christians into “all truth,” He also reveals new truths—i.e., “things to come.”….
In their belief, not only does the Spirit bear witness to the Bible He inspired (which He does, 1 Corinthians 2:6-15), but He also anoints contemporary apostle/prophets and apostlette/prophetesses to receive and reveal authoritative new revelations. These latter-day and latter-rain seers argue that Jesus’ promise to His disciples authorizes their reception of new revelations. (See above citation.)
Continuing Revelation For instance, Sandi Freed tells her followers she believes “in anointed times and seasons.” Then after citing John 16:12, she comments that for “King’s Kids” engaging in spiritual warfare, “This is an amazing passage—it explains why we receive revelation at specific times.”  Again, another advocate of latter-day-latter-rain revelations tells readers,
Throughout the world millions recognize this present day as the consummation of the ages and God’s grand finale with latter rain truth. The Scriptures tell us that [John 16:13] the Spirit of Truth is promised as our heritage to guide us into all truth and to show us things to come.
He then explains: “The Lord is standing at the door knocking with a personal invitation for profound fellowship and the unveiling of latter rain revelation.” He tells followers that they must “soar with” the Holy Spirit so that He will give them revelations like the one the Spirit gave him; which revelation was, “Go deep in order to go high!” But using John 16:12 to endorse reception of “new revelations” is not restricted to Charismatic Christians. Cults and other religions have hitchhiked on Jesus’ words to validate their extra-biblical revelations.