jury is still out
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 (on someone or something)
Fig. a decision has not been reached on someone or something; the people making the decision on someone or something have not yet decided. The jury is still out on Jane. We don't know what we are going to do about her. The jury is still out on the question of building a new parking lot.