As far as I know, Modiphius does have the license for the movie era. Regarding artwork, I heard @Modiphius-Jim talking about sharing with other licensees. So maybe the issue is that the other companies Modiphius is working with don’t do the movie era themselves.
Yet, this is all speculation. But the aforementioned benevolent line manager has offered the occasional Q&A video and this is a question that sounds just right for that category. If you won’t find an answer in this thread, maybe try out the form you’ll find behind the link. 
Besides: Welcome to the forums!