New Slin Sane formula hasn't been finalized yet, but coming from us, you can know that 1) it will be EFFECTIVE, 2) there will be NOTHING else like it, and 3) it will be very, very well priced. We don't fill our formulas with fillers to drive up the price.
SSv1 is widely available for an amazing price, a staple of many, and not going anywhere for now.