It would appear not, from what I can make out.
Given the demand for sprues would have to be enough to warrant making tens of thousands of them (due to the enormous cost of setting up a production run of plastic sprues) I doubt we will see any "new" sprues once the new figures come out, unless the new figures are made from kits themselves (which would make it technically possible for them to sell the unassembled unpainted ones if they wanted to, if there was enough demand from customers). If the new figures are single-piece moulds then I can't see any viable way they could make new plastic sprues available.