one question what will characters be like i would love a modern us marine type look like from squads but idk if we will have a more marsoc type look or look like the old insurgency i actually dont want that they a lil plain XD

There are characters that look like US Army Special Forces (Green Berets) with Multicam type camo, and there are a few different customization options, but nothing that looks explicitly like Marines. Looks more like Army, specifically special forces.

As far as i know, Squad doesn't have Marines yet, but U.S Army.