人間万事塞翁が馬 (にんげんばんじさいおうがうま): inscrutable are the ways of heaven; fortune is unpredictable and changeable

inscrutable are the ways of heaven; fortune is unpredictable and changeable

From the old man whose lost horse, returned horse and son's broken leg each turned out to be the opposite of what it looked like. Said when it is simply too early to call a piece of news good or bad.

A Japanese proverb (ことわざ)