Perhaps robh has better info than me, but I think I recently saw an ad from them, mentioning 28mms being made available again, so I'm not sure the 15mm Italian Wars range is "next".
Hope I'm wrong, but just so you know, this range was sold/bought years ago, and as far as I know, there is no imminent date for the re-production of these.
Again, hope I'm wrong, but I wouldn't hold your breath, since I think it's been about 10 years or so, since they were last available.
There are some very nice, other ranges out there, which might fill the bill, including Essex, Minifigs (haven't seen these in the flesh, but their 100 Years Wars figs were quite nice, so......), and Blue Moon is one of the latest delving into this scale, and period.
Have only seen a few pics of the BM figs, so can't really comment on their quality.