Rabbi Mordechai Eliyahu, former Chief Sephardic Rabbi of Israel says (May 16 video here, hebrew)...
"Today we are counting the Omer, and as we said there is a difference of halachic opinion. Moshiach will come in the middle [of the Omer period] and then we will ask him: 'What do we say about [this mitzvah]? Is it a biblical mitzvah, or just a mitzvah?'
"Why? Moshiach is coming, the Holy Temple is coming -- it's a biblical mitzvah [implying that we will perform the mitzvah of waving the Omer as described in the Torah]. Or, he will tell us: 'No, you needed to bring the Omer [offering] from the beginning [of the seven weeks in order to fulfill the biblical mitzvah], not now.'
Good–then we have a question to ask the Moshiach, which should be speedily in the near future, Amen!"
(Translation credit to Yiddishkeit.org)
BS"D - בסיעתא דשמיא