This famous subject... That of having the armors of the CGI trailers in the game. With the release of the High Isle CGI trailer, I updated my comparisons.
As you can see, all the armor appearing in the CGI trailers from Morrowind are almost all adapted in game. They are in their entirety from Elsweyr.
Dreaming is always allowed. Who knows if we'll get the Dunmer, Argonian, and Nord armor (notice the Nord cuirass is Nord Hero cuirass-like) from the early trailers when the respective regions get an expansion or DLC.
Note also that the bosmer armor is equipped with built-in claws if my memory is correct. The visual of the Bosmer warriors can be seen on ArtStation.
As for the legionnaires, with a little luck we will have them with Colovia. The demand is strong and almost materialized when the Imperial Ancestral style was mentioned in the official forum for the first time. At least the interest in it was brought to light. Heavy armor is quite different from Imperial or Hexos heavy armor. As for the medium armor, it is radically different and has no equivalent.