remain to be seen

remain to be seen

To not yet be clear, certain, or known. We can see for ourselves the disaster's immediate impact, but the long-term environmental effects remain to be seen. Of course, it remains to be seen whether the president's popularity on other issues will carry over into this more controversial endeavor.
See also: remain, seen
References in periodicals archive ?
The effects of the new corporate governance and business improvement plans remain to be seen.