This response is provided based on the information you shared and should not be used as the sole source for making a decision. You should seek guidance from the chain of command, IG, JAG or other certified agencies before making any decisions. How you chose to use this information is totally up to you and is your sole responsibility.
IAW with AR 623-3 and DA PAM 623-3 the rating chain cannot be retroactive. Meaning it cannot be changed after the fact. If the commander was your reviewer and is suspended or relieved, the evaluation report will simply move to the senior rater for completion. See AR 623-3 duties and responsibilities and qualification of the senior rater and reviewer. The reviewer cannot force the rater and senior rater to change their write up. They can state that the ratings are not quantified but that is all they can do unless they want to include a statement of disagreement.