If you had to choose who would return
Who would you pick to return if you had to pick no more than five actors from the previous film to return? The rest of the cast can still return, but only as cameos. My picks would be:
Scarlett
Baroness
Snake Eyes
Ray, Rachel and Sienna I'm sure many would agree were the better actors in the last film, but I'm still a bit stump who should be the last two. Commander, Destro and Zartan are loopholes since two have their faces concealed and Arnold Vosloo is almost guaranteed to only make a cameo at best since Zartan will mostly be the president in the movie.
Channing Tatum was easily the most panned thing about the last movie, and I doubt there would be much of an outcry if he and Marlon Wayans only make cameos in the sequel.
Storm Shadow is dead. Bryung-hun Lee could make a cameo to show Storm Shadow getting resurrected, but I don't think he should be a main character.