One of the topics we”ll cover as part of our “Celebrating 40 Years of Long Island Wine” series is winery succession. The next generation of winery owners will help shape what Long Island looks like for the next 40 years — and that future is unclear for some of the region’s wineries — but it’s a bit more clear for one winery today. Wolffer Estate Vineyard announced today that two of founder Christian Wolffer’s children, Joey Wolffer and Marc Wolffer, have assumed joint ownership of the Sagaponack winery. From the press release: A leader in Long Island wine country, Wölffer…