the jury is (still) out
A decision has not yet been made. A: "Are we proceeding with the ad campaign?" B: "The jury is out on that. We want to bring in a few more focus groups."
jury is still out, the
No decision has been made; the public's opinion is not known. For example, As for a possible merger, the jury is still out, or The jury is still out on the new spring fashions. This expression alludes to the jury that decides a legal case. [Colloquial; mid-1900s]