If we go back 4 years we can see how our possible predictions worked out in 2018.
Ladies: Alina Zagitova was 11 years old. I don't think anyone predicted she would be the next Olympic champion.
Men: Hanyu won the gold medal in Sochi and had not yet reached his potential. A reasonable pick to repeat in Pyeongchang.
Pairs: Savchenko and Szolkowy ended their partnership in 2014. They're done.
Dance: Virtue and Moir "retired." Chock and Bates were briefly regarded as #1. Papadakis and Czizeron got 13th at 2014 Worlds.
Actually, most people did predict Alina, they just didn't know her name (if you look at the thread, it says that a young Russian in her 1st or 2nd year as a senior, or something like that).