As one of their Core ranges they do plan to flesh them out with heavy weapons, tanks and female marines, in plastic. IIRC
Just a minute, went on the website, here's a quote;
So with the USMC you'll have infantry followed closely by power armor (what we call hardsuits), then female Marines, and then heavy weapons. Over time, we will continue to add to those Core Forces with supplemental sets, vehicles, etc. - all in hard plastic.
Looks like vehicles will be last, which makes sense as they are the most expensive for them to make and have the most plastic substitutes already.