remain to be seen

remain to be seen (third-person singular simple present remains to be seen, present participle remaining to be seen, simple past and past participle remained to be seen)

1. (idiomatic) To have not yet happened; to be as yet unknown.

   It remains to be seen whether he will win the election.

   • 2013 January 18, Howard Kurtz, “A loss for Lance, a win for Oprah”, in CNN‎:

     Then came the leak (to the AP) that [Lance Armstrong] had in fact told Oprah he'd been a doper. So all that remained to be seen were what words Armstrong would use and what demeanor he would display.