A comic coming out now would probably have had the art done a couple of months ago. And shooting just began a week or so ago, so casting was probably concluded fairly recently -- indeed, casting for some smaller roles might not even have been completed yet, depending on when their scenes are shot. I'd say it's too early to expect likenesses of new cast members.
Yes I think that is probably correct. Although they may use a vague likeness with a distinctive hairdo that they can plop on any old actress. Rand for example may not be in the next movie but there was at least one blonde crewman with the same hairdo in the last movie.