I have no idea of predictions you talk of, but I do have a hope in scripture as I believe them, prophesy unfulfilled, and glory to come. Will that affect my salvation? My salvation is not based of my knowledge of prophesy, but my belief on the Lord Jesus Christ.
That depends on which salvation you refer to. Salvation now (temporal) or salvation from hell?
If one does good works and does His commands, it shows God he is a good and faithful servant.
But if one's time is just spent on the end of all things "to come" without regard for preaching good news NOW and for the future, then I don't think one is doing good works, but preaching bad news for the world and selfishly thinking they are saved so it doesn't matter- but it does! In fact they are acting like psychics. Salvation now depends on doing God's will and not something He hates.
Why preach about prophecy, something futurists don't seem to understand? Do you think it pleases God?
I believe the following concerning salvation, and the works you talk of are judged for reward; not salvation.
First - It is provisional. If you accept Jesus as your savior, you will be saved. (Romans 10:9-10) "If you say with your mouth that Jesus is Lord, and believe in your heart that God raised Him from the dead, you will be saved, (10) For with the heart man believeth unto righteousness; and with the mouth confession is made unto salvation."
Second - When you become saved, it is at this time that you are born again and have overcome the penalty of sin, or become saved from the great white throne judgment and the resulting lake of fire. (Repeating John 5:24), "Verily, verily, I say unto you, He that heareth my word, and believeth on him that sent me, hath everlasting life, and shall not come into condemnation; but is passed from death unto life." In (Romans 8:1) "There is therefore now no condemnation to them which are in Christ Jesus."
Third - The working out your own salvation referred to in (Philippians 2:12) is learning to overcome the habit of sin in our lives. This is the experiencing part of our salvation and is another step in our growth as a Christian. (2 Peter 1:5-7) tells us to "Add to your faith virtue, knowledge, temperance, patience, godliness, brotherly kindness and charity." To realize this growth in our lives, we must learn to begin counting our old man dead. (Romans 6:6) "Knowing this, that our old man (The Adamic nature) is crucified with him, that the body of sin might be destroyed, that henceforth we should not serve sin.