Of course the reason is to have our Bais Hamikdosh and bring karbonos and come close to Hashem. Then we can bring about the greatest Kiddush Hashem and bring the shechina out of galus.
But I can’t help thinking will Mashiach tzidkeinu be black hat or srugie or turban? Will he wear tefillin on chol hamoed or not. tzitzis 1 hole or 2? Sefardi or Ashkenazi? If Ashkenaz, nusach sefard or nusach ashkenaz?…