Wow, the possibilities for this are interesting. An officer set for the American side could include a young U.S. Grant, Lee, and the other West Point graduates, many of whom you have already depicted for the American Civil War. Sam Ringold of Flying Artillery fame, Sam Walker of the Texas Rangers, Zachary Taylor and Winfield Scott. For the Mexicans, Santa Anna, Arrista, Jean Louis Berlandier, Pedro Ampudia, Anastacio Terejon, all in uniforms which would probably thrill your Napoleanic enthusiasts. Also, a San Patricio Brigade set with John Riley. There are a lot of possibilities for a series never done before in this hobby.
On another note, I hear that my country is finally sending yours weapons again. Your soldiers are amazing and I know that they will beat Putin. Stay safe.