Regarding the second coming of Christ, did the disciples (Paul, Peter, John) ever discuss that prophecy? [2 Peter 3:16-20, Revelation 20, 2 Thessalonians 2:1-10, John 16:3, Ephesians].
Are there scriptures that substantiate that belief in the trinity is not necessary to follow Jesus and be saved? [Luke 10:20, John 5:24, John 14:9, John 16:3, I John 2:22, Romans 10:9].
Do you think that the people who he is talking about when he says that some think they are saved, but they are not are identified in John 16? [Matthew 7:21-23, John 16:2-3].
